diff --git a/scripts/modules/bl_i18n_utils/utils_spell_check.py b/scripts/modules/bl_i18n_utils/utils_spell_check.py
index 5057055bca7..e14df966928 100644
--- a/scripts/modules/bl_i18n_utils/utils_spell_check.py
+++ b/scripts/modules/bl_i18n_utils/utils_spell_check.py
@@ -646,7 +646,6 @@ class SpellChecker:
         "polygroup", "polygroups",
         "poselib",
         "pushpull",
-        "pyconstraint", "pyconstraints",
         "qe",  # keys...
         "shaderfx", "shaderfxs",
         "shapekey", "shapekeys",
diff --git a/scripts/startup/bl_ui/properties_constraint.py b/scripts/startup/bl_ui/properties_constraint.py
index a36855d425c..39c7a43290f 100644
--- a/scripts/startup/bl_ui/properties_constraint.py
+++ b/scripts/startup/bl_ui/properties_constraint.py
@@ -857,10 +857,6 @@ class ConstraintButtonsPanel:
 
         self.draw_influence(layout, con)
 
-    def draw_python_constraint(self, _context):
-        layout = self.layout
-        layout.label(text="Blender 2.6 doesn't support Python constraints yet")
-
     def draw_armature(self, context):
         layout = self.layout
         con = self.get_constraint(context)
@@ -1650,18 +1646,6 @@ class BONE_PT_bTransformCacheConstraint_time(BoneConstraintPanel, ConstraintButt
         self.draw_transform_cache_time(context)
 
 
-# Python Constraint
-
-class OBJECT_PT_bPythonConstraint(ObjectConstraintPanel, ConstraintButtonsPanel, Panel):
-    def draw(self, context):
-        self.draw_python_constraint(context)
-
-
-class BONE_PT_bPythonConstraint(BoneConstraintPanel, ConstraintButtonsPanel, Panel):
-    def draw(self, context):
-        self.draw_python_constraint(context)
-
-
 # Armature Constraint
 
 class OBJECT_PT_bArmatureConstraint(ObjectConstraintPanel, ConstraintButtonsPanel, Panel):
@@ -1740,7 +1724,6 @@ classes = (
     OBJECT_PT_bTransformCacheConstraint_procedural,
     OBJECT_PT_bTransformCacheConstraint_velocity,
     OBJECT_PT_bTransformCacheConstraint_layers,
-    OBJECT_PT_bPythonConstraint,
     OBJECT_PT_bArmatureConstraint,
     OBJECT_PT_bArmatureConstraint_bones,
     # Bone panels
@@ -1781,7 +1764,6 @@ classes = (
     BONE_PT_bTransformCacheConstraint_procedural,
     BONE_PT_bTransformCacheConstraint_velocity,
     BONE_PT_bTransformCacheConstraint_layers,
-    BONE_PT_bPythonConstraint,
     BONE_PT_bArmatureConstraint,
     BONE_PT_bArmatureConstraint_bones,
 )
diff --git a/source/blender/blenkernel/intern/constraint.cc b/source/blender/blenkernel/intern/constraint.cc
index 92874dbef98..91972f47a9a 100644
--- a/source/blender/blenkernel/intern/constraint.cc
+++ b/source/blender/blenkernel/intern/constraint.cc
@@ -2466,139 +2466,6 @@ static bConstraintTypeInfo CTI_SAMEVOL = {
     /*evaluate_constraint*/ samevolume_evaluate,
 };
 
-/* ----------- Python Constraint -------------- */
-
-static void pycon_free(bConstraint *con)
-{
-  bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-
-  /* id-properties */
-  IDP_FreeProperty(data->prop);
-
-  /* multiple targets */
-  BLI_freelistN(&data->targets);
-}
-
-static void pycon_copy(bConstraint *con, bConstraint *srccon)
-{
-  bPythonConstraint *pycon = (bPythonConstraint *)con->data;
-  bPythonConstraint *opycon = (bPythonConstraint *)srccon->data;
-
-  pycon->prop = IDP_CopyProperty(opycon->prop);
-  BLI_duplicatelist(&pycon->targets, &opycon->targets);
-}
-
-static void pycon_new_data(void *cdata)
-{
-  bPythonConstraint *data = (bPythonConstraint *)cdata;
-
-  /* Everything should be set correctly by calloc, except for the prop->type constant. */
-  data->prop = MEM_callocN<IDProperty>("PyConstraintProps");
-  data->prop->type = IDP_GROUP;
-}
-
-static int pycon_get_tars(bConstraint *con, ListBase *list)
-{
-  if (con && list) {
-    bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-
-    list->first = data->targets.first;
-    list->last = data->targets.last;
-
-    return data->tarnum;
-  }
-
-  return 0;
-}
-
-static void pycon_id_looper(bConstraint *con, ConstraintIDFunc func, void *userdata)
-{
-  bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-
-  /* targets */
-  LISTBASE_FOREACH (bConstraintTarget *, ct, &data->targets) {
-    func(con, (ID **)&ct->tar, false, userdata);
-  }
-
-  /* script */
-  func(con, (ID **)&data->text, true, userdata);
-}
-
-/* Whether this approach is maintained remains to be seen (aligorith) */
-static bool pycon_get_tarmat(Depsgraph * /*depsgraph*/,
-                             bConstraint *con,
-                             bConstraintOb *cob,
-                             bConstraintTarget *ct,
-                             float /*ctime*/)
-{
-#ifdef WITH_PYTHON
-  bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-#endif
-
-  if (!VALID_CONS_TARGET(ct)) {
-    unit_ct_matrix_nullsafe(ct);
-    return false;
-  }
-
-  if (ct->tar->type == OB_CURVES_LEGACY && ct->tar->runtime->curve_cache == nullptr) {
-    unit_m4(ct->matrix);
-    return false;
-  }
-
-  /* firstly calculate the matrix the normal way, then let the py-function override
-   * this matrix if it needs to do so
-   */
-  constraint_target_to_mat4(ct->tar,
-                            ct->subtarget,
-                            cob,
-                            ct->matrix,
-                            CONSTRAINT_SPACE_WORLD,
-                            ct->space,
-                            con->flag,
-                            con->headtail);
-
-/* only execute target calculation if allowed */
-#ifdef WITH_PYTHON
-  if (G.f & G_FLAG_SCRIPT_AUTOEXEC) {
-    BPY_pyconstraint_target(data, ct);
-  }
-#endif
-  return true;
-}
-
-static void pycon_evaluate(bConstraint *con, bConstraintOb *cob, ListBase *targets)
-{
-#ifndef WITH_PYTHON
-  UNUSED_VARS(con, cob, targets);
-  return;
-#else
-  bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-
-  /* only evaluate in python if we're allowed to do so */
-  if ((G.f & G_FLAG_SCRIPT_AUTOEXEC) == 0) {
-    return;
-  }
-
-  /* Now, run the actual 'constraint' function, which should only access the matrices */
-  BPY_pyconstraint_exec(data, cob, targets);
-#endif /* WITH_PYTHON */
-}
-
-static bConstraintTypeInfo CTI_PYTHON = {
-    /*type*/ CONSTRAINT_TYPE_PYTHON,
-    /*size*/ sizeof(bPythonConstraint),
-    /*name*/ N_("Script"),
-    /*struct_name*/ "bPythonConstraint",
-    /*free_data*/ pycon_free,
-    /*id_looper*/ pycon_id_looper,
-    /*copy_data*/ pycon_copy,
-    /*new_data*/ pycon_new_data,
-    /*get_constraint_targets*/ pycon_get_tars,
-    /*flush_constraint_targets*/ nullptr,
-    /*get_target_matrix*/ pycon_get_tarmat,
-    /*evaluate_constraint*/ pycon_evaluate,
-};
-
 /* ----------- Armature Constraint -------------- */
 
 static void armdef_free(bConstraint *con)
@@ -5597,7 +5464,7 @@ static void constraints_init_typeinfo()
   constraintsTypeInfo[8] = &CTI_ROTLIKE;          /* Copy Rotation Constraint */
   constraintsTypeInfo[9] = &CTI_LOCLIKE;          /* Copy Location Constraint */
   constraintsTypeInfo[10] = &CTI_SIZELIKE;        /* Copy Scale Constraint */
-  constraintsTypeInfo[11] = &CTI_PYTHON;          /* Python/Script Constraint */
+  constraintsTypeInfo[11] = nullptr;              /* Python/Script Constraint: DEPRECATED. */
   constraintsTypeInfo[12] = &CTI_ACTION;          /* Action Constraint */
   constraintsTypeInfo[13] = &CTI_LOCKTRACK;       /* Locked-Track Constraint */
   constraintsTypeInfo[14] = &CTI_DISTLIMIT;       /* Limit Distance Constraint */
@@ -6181,10 +6048,7 @@ static bConstraint *constraint_list_find_from_target(ListBase *constraints, bCon
   LISTBASE_FOREACH (bConstraint *, con, constraints) {
     ListBase *targets = nullptr;
 
-    if (con->type == CONSTRAINT_TYPE_PYTHON) {
-      targets = &((bPythonConstraint *)con->data)->targets;
-    }
-    else if (con->type == CONSTRAINT_TYPE_ARMATURE) {
+    if (con->type == CONSTRAINT_TYPE_ARMATURE) {
       targets = &((bArmatureConstraint *)con->data)->targets;
     }
 
@@ -6587,20 +6451,6 @@ void BKE_constraint_blend_write(BlendWriter *writer, ListBase *conlist)
 
       /* do any constraint specific stuff */
       switch (con->type) {
-        case CONSTRAINT_TYPE_PYTHON: {
-          bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-
-          /* write targets */
-          LISTBASE_FOREACH (bConstraintTarget *, ct, &data->targets) {
-            BLO_write_struct(writer, bConstraintTarget, ct);
-          }
-
-          /* Write ID Properties -- and copy this comment EXACTLY for easy finding
-           * of library blocks that implement this. */
-          IDP_BlendWrite(writer, data->prop);
-
-          break;
-        }
         case CONSTRAINT_TYPE_ARMATURE: {
           bArmatureConstraint *data = static_cast<bArmatureConstraint *>(con->data);
 
@@ -6643,9 +6493,6 @@ void BKE_constraint_blend_read_data(BlendDataReader *reader, ID *id_owner, ListB
 
     /* Patch for error introduced by changing constraints (don't know how). */
     /* NOTE(@ton): If `con->data` type changes, DNA cannot resolve the pointer!. */
-    /* FIXME This is likely dead code actually, since it used to be in
-     * constraint 'read_lib', so it would have crashed on null pointer access in any of
-     * the code below? But does not hurt to keep it around as a safety measure. */
     if (con->data == nullptr) {
       con->type = CONSTRAINT_TYPE_NULL;
     }
@@ -6656,15 +6503,6 @@ void BKE_constraint_blend_read_data(BlendDataReader *reader, ID *id_owner, ListB
     }
 
     switch (con->type) {
-      case CONSTRAINT_TYPE_PYTHON: {
-        bPythonConstraint *data = static_cast<bPythonConstraint *>(con->data);
-
-        BLO_read_struct_list(reader, bConstraintTarget, &data->targets);
-
-        BLO_read_struct(reader, IDProperty, &data->prop);
-        IDP_BlendDataRead(reader, &data->prop);
-        break;
-      }
       case CONSTRAINT_TYPE_ARMATURE: {
         bArmatureConstraint *data = static_cast<bArmatureConstraint *>(con->data);
 
diff --git a/source/blender/blenloader/intern/versioning_280.cc b/source/blender/blenloader/intern/versioning_280.cc
index f6522e8985f..bc93aeedbaf 100644
--- a/source/blender/blenloader/intern/versioning_280.cc
+++ b/source/blender/blenloader/intern/versioning_280.cc
@@ -3254,19 +3254,6 @@ void blo_do_versions_280(FileData *fd, Library * /*lib*/, Main *bmain)
       }
     }
 
-    LISTBASE_FOREACH (Object *, ob, &bmain->objects) {
-      bConstraint *con = static_cast<bConstraint *>(ob->constraints.first);
-      while (con) {
-        bConstraint *con_next = static_cast<bConstraint *>(con->next);
-        if (con->type == 17) { /* CONSTRAINT_TYPE_RIGIDBODYJOINT */
-          BLI_remlink(&ob->constraints, con);
-          BKE_constraint_free_data(con);
-          MEM_freeN(con);
-        }
-        con = con_next;
-      }
-    }
-
     LISTBASE_FOREACH (bScreen *, screen, &bmain->screens) {
       LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
         LISTBASE_FOREACH (SpaceLink *, sl, &area->spacedata) {
diff --git a/source/blender/blenloader/intern/versioning_legacy.cc b/source/blender/blenloader/intern/versioning_legacy.cc
index 376e0c4efc1..433534d7621 100644
--- a/source/blender/blenloader/intern/versioning_legacy.cc
+++ b/source/blender/blenloader/intern/versioning_legacy.cc
@@ -407,28 +407,8 @@ static void do_version_free_effects_245(ListBase *lb)
 
 static void do_version_constraints_245(ListBase *lb)
 {
-  bConstraintTarget *ct;
-
   LISTBASE_FOREACH (bConstraint *, con, lb) {
-    if (con->type == CONSTRAINT_TYPE_PYTHON) {
-      bPythonConstraint *data = (bPythonConstraint *)con->data;
-      if (data->tar) {
-        /* version patching needs to be done */
-        ct = MEM_callocN<bConstraintTarget>("PyConTarget");
-
-        ct->tar = data->tar;
-        STRNCPY(ct->subtarget, data->subtarget);
-        ct->space = con->tarspace;
-
-        BLI_addtail(&data->targets, ct);
-        data->tarnum++;
-
-        /* clear old targets to avoid problems */
-        data->tar = nullptr;
-        data->subtarget[0] = '\0';
-      }
-    }
-    else if (con->type == CONSTRAINT_TYPE_LOCLIKE) {
+    if (con->type == CONSTRAINT_TYPE_LOCLIKE) {
       bLocateLikeConstraint *data = (bLocateLikeConstraint *)con->data;
 
       /* new headtail functionality makes Bone-Tip function obsolete */
diff --git a/source/blender/editors/object/object_constraint.cc b/source/blender/editors/object/object_constraint.cc
index 1a716a84cb9..08999511823 100644
--- a/source/blender/editors/object/object_constraint.cc
+++ b/source/blender/editors/object/object_constraint.cc
@@ -154,99 +154,6 @@ bConstraint *constraint_active_get(Object *ob)
 
 /** \} */
 
-/* ------------------------------------------------------------------- */
-/** \name PyConstraints (Unused)
- * \{ */
-
-#ifdef WITH_PYTHON
-
-/* this callback sets the text-file to be used for selected menu item */
-static void validate_pyconstraint_cb(Main *bmain, void *arg1, void *arg2)
-{
-  bPythonConstraint *data = static_cast<bPythonConstraint *>(arg1);
-  Text *text = nullptr;
-  int index = *((int *)arg2);
-  int i;
-
-  /* exception for no script */
-  if (index) {
-    /* innovative use of a for...loop to search */
-    for (text = static_cast<Text *>(bmain->texts.first), i = 1; text && index != i;
-         i++, text = static_cast<Text *>(text->id.next))
-    {
-      /* pass */
-    }
-  }
-  data->text = text;
-}
-
-/* this returns a string for the list of usable pyconstraint script names */
-static char *buildmenu_pyconstraints(Main *bmain, Text *con_text, int *pyconindex)
-{
-  DynStr *pupds = BLI_dynstr_new();
-  Text *text;
-  char *str;
-  char buf[64];
-  int i;
-
-  /* add title first */
-  STRNCPY(buf, "Scripts: %t|[None]%x0|");
-  BLI_dynstr_append(pupds, buf);
-
-  /* init active-index first */
-  if (con_text == nullptr) {
-    *pyconindex = 0;
-  }
-
-  /* loop through markers, adding them */
-  for (text = static_cast<Text *>(bmain->texts.first), i = 1; text;
-       i++, text = static_cast<Text *>(text->id.next))
-  {
-    /* this is important to ensure that right script is shown as active */
-    if (text == con_text) {
-      *pyconindex = i;
-    }
-
-    /* only include valid pyconstraint scripts */
-    if (BPY_is_pyconstraint(text)) {
-      BLI_dynstr_append(pupds, text->id.name + 2);
-
-      SNPRINTF(buf, "%%x%d", i);
-      BLI_dynstr_append(pupds, buf);
-
-      if (text->id.next) {
-        BLI_dynstr_append(pupds, "|");
-      }
-    }
-  }
-
-  /* convert to normal MEM_malloc'd string */
-  str = BLI_dynstr_get_cstring(pupds);
-  BLI_dynstr_free(pupds);
-
-  return str;
-}
-#endif /* WITH_PYTHON */
-
-#if 0 /* UNUSED, until pyconstraints are added back. */
-/* this callback gets called when the 'refresh' button of a pyconstraint gets pressed */
-static void update_pyconstraint_cb(void *arg1, void *arg2)
-{
-#  ifndef WITH_PYTHON
-  (void)arg1; /* unused */
-  (void)arg2; /* unused */
-#  else
-  Object *owner = (Object *)arg1;
-  bConstraint *con = (bConstraint *)arg2;
-  if (owner && con) {
-    BPY_pyconstraint_update(owner, con);
-  }
-#  endif /* WITH_PYTHON */
-}
-#endif   /* UNUSED */
-
-/** \} */
-
 /* ------------------------------------------------------------------- */
 /** \name Add Constraint Utilities
  * \{ */
@@ -2440,34 +2347,6 @@ static wmOperatorStatus constraint_add_exec(
     }
   }
 
-  /* Do type-specific tweaking to the constraint settings. */
-  switch (type) {
-    case CONSTRAINT_TYPE_PYTHON: /* FIXME: this code is not really valid anymore */
-    {
-#ifdef WITH_PYTHON
-      char *menustr;
-      int scriptint = 0;
-      /* popup a list of usable scripts */
-      menustr = buildmenu_pyconstraints(bmain, nullptr, &scriptint);
-      // scriptint = pupmenu(menustr); /* XXX */
-      MEM_freeN(menustr);
-
-      /* only add constraint if a script was chosen */
-      if (scriptint) {
-        /* add constraint */
-        validate_pyconstraint_cb(bmain, con->data, &scriptint);
-
-        /* make sure target allowance is set correctly */
-        BPY_pyconstraint_update(ob, con);
-      }
-#endif
-      break;
-    }
-
-    default:
-      break;
-  }
-
   /* make sure all settings are valid - similar to above checks, but sometimes can be wrong */
   object_test_constraints(bmain, ob);
 
diff --git a/source/blender/editors/space_text/space_text.cc b/source/blender/editors/space_text/space_text.cc
index 85fa1d95c69..e55c7afb486 100644
--- a/source/blender/editors/space_text/space_text.cc
+++ b/source/blender/editors/space_text/space_text.cc
@@ -167,7 +167,6 @@ static void text_operatortypes()
   WM_operatortype_append(TEXT_OT_save_as);
   WM_operatortype_append(TEXT_OT_make_internal);
   WM_operatortype_append(TEXT_OT_run_script);
-  WM_operatortype_append(TEXT_OT_refresh_pyconstraints);
 
   WM_operatortype_append(TEXT_OT_paste);
   WM_operatortype_append(TEXT_OT_copy);
diff --git a/source/blender/editors/space_text/text_intern.hh b/source/blender/editors/space_text/text_intern.hh
index bfbc6a9141a..d5b3a77e8c7 100644
--- a/source/blender/editors/space_text/text_intern.hh
+++ b/source/blender/editors/space_text/text_intern.hh
@@ -121,7 +121,6 @@ void TEXT_OT_save(wmOperatorType *ot);
 void TEXT_OT_save_as(wmOperatorType *ot);
 void TEXT_OT_make_internal(wmOperatorType *ot);
 void TEXT_OT_run_script(wmOperatorType *ot);
-void TEXT_OT_refresh_pyconstraints(wmOperatorType *ot);
 
 void TEXT_OT_paste(wmOperatorType *ot);
 void TEXT_OT_copy(wmOperatorType *ot);
diff --git a/source/blender/editors/space_text/text_ops.cc b/source/blender/editors/space_text/text_ops.cc
index 9f49c5d8724..f73e18a25fe 100644
--- a/source/blender/editors/space_text/text_ops.cc
+++ b/source/blender/editors/space_text/text_ops.cc
@@ -924,71 +924,6 @@ void TEXT_OT_run_script(wmOperatorType *ot)
 
 /** \} */
 
-/* -------------------------------------------------------------------- */
-/** \name Refresh Pyconstraints Operator
- * \{ */
-
-static wmOperatorStatus text_refresh_pyconstraints_exec(bContext * /*C*/, wmOperator * /*op*/)
-{
-#ifdef WITH_PYTHON
-#  if 0
-  Main *bmain = CTX_data_main(C);
-  Text *text = CTX_data_edit_text(C);
-  Object *ob;
-  bConstraint *con;
-  bool update;
-
-  /* check all pyconstraints */
-  for (ob = bmain->objects.first; ob; ob = ob->id.next) {
-    update = false;
-    if (ob->type == OB_ARMATURE && ob->pose) {
-      bPoseChannel *pchan;
-      for (pchan = ob->pose->chanbase.first; pchan; pchan = pchan->next) {
-        for (con = pchan->constraints.first; con; con = con->next) {
-          if (con->type == CONSTRAINT_TYPE_PYTHON) {
-            bPythonConstraint *data = con->data;
-            if (data->text == text) {
-              BPY_pyconstraint_update(ob, con);
-            }
-            update = true;
-          }
-        }
-      }
-    }
-    for (con = ob->constraints.first; con; con = con->next) {
-      if (con->type == CONSTRAINT_TYPE_PYTHON) {
-        bPythonConstraint *data = con->data;
-        if (data->text == text) {
-          BPY_pyconstraint_update(ob, con);
-        }
-        update = true;
-      }
-    }
-
-    if (update) {
-      DEG_id_tag_update(&ob->id, ID_RECALC_GEOMETRY);
-    }
-  }
-#  endif
-#endif
-
-  return OPERATOR_FINISHED;
-}
-
-void TEXT_OT_refresh_pyconstraints(wmOperatorType *ot)
-{
-  /* identifiers */
-  ot->name = "Refresh PyConstraints";
-  ot->idname = "TEXT_OT_refresh_pyconstraints";
-  ot->description = "Refresh all pyconstraints";
-
-  /* api callbacks */
-  ot->exec = text_refresh_pyconstraints_exec;
-  ot->poll = text_edit_poll;
-}
-
-/** \} */
-
 /* -------------------------------------------------------------------- */
 /** \name Paste Operator
  * \{ */
diff --git a/source/blender/makesdna/DNA_constraint_types.h b/source/blender/makesdna/DNA_constraint_types.h
index e2f1794caa9..78ee5584013 100644
--- a/source/blender/makesdna/DNA_constraint_types.h
+++ b/source/blender/makesdna/DNA_constraint_types.h
@@ -119,33 +119,6 @@ typedef enum eConstraintObType {
   /* CONSTRAINT_OBTYPE_CV = 4, */ /* UNUSED */
 } eConstraintObType;
 
-/* Python Script Constraint */
-typedef struct bPythonConstraint {
-  /** Text-buffer (containing script) to execute. */
-  struct Text *text;
-  /** 'id-properties' used to store custom properties for constraint. */
-  IDProperty *prop;
-
-  /** General settings/state indicators accessed by bitmapping. */
-  int flag;
-  /** Number of targets - usually only 1-3 are needed. */
-  int tarnum;
-
-  /** A list of targets that this constraint has (bConstraintTarget-s). */
-  ListBase targets;
-
-  /**
-   * Target from previous implementation
-   * (version-patch sets this to NULL on file-load).
-   */
-  struct Object *tar;
-  /**
-   * Subtarget from previous implementation
-   * (version-patch sets this to "" on file-load), MAX_ID_NAME-2.
-   */
-  char subtarget[64];
-} bPythonConstraint;
-
 /* Inverse-Kinematics (IK) constraint
  * This constraint supports a variety of mode determine by the type field
  * according to eConstraint_IK_Type.
@@ -638,7 +611,7 @@ typedef enum eBConstraint_Types {
   CONSTRAINT_TYPE_ROTLIKE = 8,
   CONSTRAINT_TYPE_LOCLIKE = 9,
   CONSTRAINT_TYPE_SIZELIKE = 10,
-  CONSTRAINT_TYPE_PYTHON = 11,
+  /* CONSTRAINT_TYPE_DEPRECATED = 11, */
   CONSTRAINT_TYPE_ACTION = 12,
   CONSTRAINT_TYPE_LOCKTRACK = 13,
   CONSTRAINT_TYPE_DISTLIMIT = 14,
diff --git a/source/blender/makesrna/intern/rna_constraint.cc b/source/blender/makesrna/intern/rna_constraint.cc
index 23dd3d8c894..0c468cf7bf2 100644
--- a/source/blender/makesrna/intern/rna_constraint.cc
+++ b/source/blender/makesrna/intern/rna_constraint.cc
@@ -160,18 +160,6 @@ const EnumPropertyItem rna_enum_constraint_type_items[] = {
      ICON_CON_PIVOT,
      "Pivot",
      "Change pivot point for transforms (buggy)"},
-#if 0
-    {CONSTRAINT_TYPE_RIGIDBODYJOINT,
-     "RIGID_BODY_JOINT",
-     ICON_CONSTRAINT_DATA,
-     "Rigid Body Joint",
-     "Use to define a Rigid Body Constraint (for Game Engine use only)"},
-    {CONSTRAINT_TYPE_PYTHON,
-     "SCRIPT",
-     ICON_CONSTRAINT_DATA,
-     "Script",
-     "Custom constraint(s) written in Python (Not yet implemented)"},
-#endif
     {CONSTRAINT_TYPE_SHRINKWRAP,
      "SHRINKWRAP",
      ICON_CON_SHRINKWRAP,
@@ -353,8 +341,6 @@ static StructRNA *rna_ConstraintType_refine(PointerRNA *ptr)
       return &RNA_CopyScaleConstraint;
     case CONSTRAINT_TYPE_SAMEVOL:
       return &RNA_MaintainVolumeConstraint;
-    case CONSTRAINT_TYPE_PYTHON:
-      return &RNA_PythonConstraint;
     case CONSTRAINT_TYPE_ARMATURE:
       return &RNA_ArmatureConstraint;
     case CONSTRAINT_TYPE_ACTION:
@@ -491,10 +477,6 @@ static std::optional<std::string> rna_ConstraintTarget_path(const PointerRNA *pt
       bArmatureConstraint *acon = static_cast<bArmatureConstraint *>(con->data);
       index = BLI_findindex(&acon->targets, tgt);
     }
-    else if (con->type == CONSTRAINT_TYPE_PYTHON) {
-      bPythonConstraint *pcon = static_cast<bPythonConstraint *>(con->data);
-      index = BLI_findindex(&pcon->targets, tgt);
-    }
   }
 
   if (index >= 0) {
@@ -1170,46 +1152,6 @@ static void rna_def_constraint_childof(BlenderRNA *brna)
   RNA_define_lib_overridable(false);
 }
 
-static void rna_def_constraint_python(BlenderRNA *brna)
-{
-  StructRNA *srna;
-  PropertyRNA *prop;
-
-  srna = RNA_def_struct(brna, "PythonConstraint", "Constraint");
-  RNA_def_struct_ui_text(srna, "Python Constraint", "Use Python script for constraint evaluation");
-  RNA_def_struct_sdna_from(srna, "bPythonConstraint", "data");
-
-  RNA_define_lib_overridable(true);
-
-  prop = RNA_def_property(srna, "targets", PROP_COLLECTION, PROP_NONE);
-  RNA_def_property_collection_sdna(prop, nullptr, "targets", nullptr);
-  RNA_def_property_struct_type(prop, "ConstraintTarget");
-  RNA_def_property_ui_text(prop, "Targets", "Target Objects");
-
-  prop = RNA_def_property(srna, "target_count", PROP_INT, PROP_NONE);
-  RNA_def_property_int_sdna(prop, nullptr, "tarnum");
-  RNA_def_property_ui_text(prop, "Number of Targets", "Usually only 1 to 3 are needed");
-  RNA_def_property_update(prop, NC_OBJECT | ND_CONSTRAINT, "rna_Constraint_dependency_update");
-
-  prop = RNA_def_property(srna, "text", PROP_POINTER, PROP_NONE);
-  RNA_def_property_ui_text(prop, "Script", "The text object that contains the Python script");
-  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_REFCOUNT);
-  RNA_def_property_update(prop, NC_OBJECT | ND_CONSTRAINT, "rna_Constraint_update");
-
-  prop = RNA_def_property(srna, "use_targets", PROP_BOOLEAN, PROP_NONE);
-  RNA_def_property_boolean_sdna(prop, nullptr, "flag", PYCON_USETARGETS);
-  RNA_def_property_ui_text(
-      prop, "Use Targets", "Use the targets indicated in the constraint panel");
-  RNA_def_property_update(prop, NC_OBJECT | ND_CONSTRAINT, "rna_Constraint_dependency_update");
-
-  prop = RNA_def_property(srna, "has_script_error", PROP_BOOLEAN, PROP_NONE);
-  RNA_def_property_boolean_sdna(prop, nullptr, "flag", PYCON_SCRIPTERROR);
-  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
-  RNA_def_property_ui_text(prop, "Script Error", "The linked Python script has thrown an error");
-
-  RNA_define_lib_overridable(false);
-}
-
 static void rna_def_constraint_armature_deform_targets(BlenderRNA *brna, PropertyRNA *cprop)
 {
   StructRNA *srna;
@@ -3793,7 +3735,6 @@ void RNA_def_constraint(BlenderRNA *brna)
   rna_def_constrainttarget_bone(brna);
 
   rna_def_constraint_childof(brna);
-  rna_def_constraint_python(brna);
   rna_def_constraint_armature_deform(brna);
   rna_def_constraint_stretch_to(brna);
   rna_def_constraint_follow_path(brna);
diff --git a/source/blender/python/BPY_extern.hh b/source/blender/python/BPY_extern.hh
index e0e6cb6f908..a6bf889baa5 100644
--- a/source/blender/python/BPY_extern.hh
+++ b/source/blender/python/BPY_extern.hh
@@ -31,17 +31,9 @@ struct bConstraintOb;     /* DNA_constraint_types.h */
 struct bConstraintTarget; /* DNA_constraint_types.h */
 struct bContext;
 struct bContextDataResult;
-struct bPythonConstraint; /* DNA_constraint_types.h */
 struct StructRNA;
 struct wmWindowManager;
 
-void BPY_pyconstraint_exec(bPythonConstraint *con, bConstraintOb *cob, ListBase *targets);
-//  void BPY_pyconstraint_settings(void *arg1, void *arg2);
-void BPY_pyconstraint_target(bPythonConstraint *con, bConstraintTarget *ct);
-void BPY_pyconstraint_update(Object *owner, bConstraint *con);
-bool BPY_is_pyconstraint(Text *text);
-//  void BPY_free_pyconstraint_links(struct Text *text);
-
 /* global interpreter lock */
 
 using BPy_ThreadStatePtr = void *;
diff --git a/source/blender/python/intern/CMakeLists.txt b/source/blender/python/intern/CMakeLists.txt
index 68d977e1c05..dca94d897b8 100644
--- a/source/blender/python/intern/CMakeLists.txt
+++ b/source/blender/python/intern/CMakeLists.txt
@@ -65,7 +65,6 @@ set(SRC
   bpy_traceback.cc
   bpy_utils_previews.cc
   bpy_utils_units.cc
-  stubs.cc
 
   bpy.hh
   bpy_app.hh
diff --git a/source/blender/python/intern/stubs.cc b/source/blender/python/intern/stubs.cc
deleted file mode 100644
index 45eb2f51570..00000000000
--- a/source/blender/python/intern/stubs.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-/* SPDX-FileCopyrightText: 2007 Blender Authors
- *
- * SPDX-License-Identifier: GPL-2.0-or-later */
-
-/** \file
- * \ingroup pythonintern
- */
-
-#include "BPY_extern.hh"
-
-/* python, will come back */
-// void BPY_script_exec() {}
-// void BPY_python_start() {}
-void BPY_pyconstraint_exec(bPythonConstraint * /*con*/,
-                           bConstraintOb * /*cob*/,
-                           ListBase * /*targets*/)
-{
-}
-void BPY_pyconstraint_target(bPythonConstraint * /*con*/, bConstraintTarget * /*ct*/) {}
-bool BPY_is_pyconstraint(Text * /*text*/)
-{
-  return false;
-}
-void BPY_pyconstraint_update(Object * /*owner*/, bConstraint * /*con*/) {}