Fix #128616: Allow Docking to work from Menu shortcut

Allow Docking to work correctly if using a shortcut to the area header
context menu item. There is no longer a need to set the source or
target area locations.

Pull Request: https://projects.blender.org/blender/blender/pulls/128730

source/blender/editors/screen/screen_ops.cc

@@ -4946,9 +4946,6 @@ static void screen_area_menu_items(ScrArea *area, uiLayout *layout)
 
   PointerRNA ptr;
 
-  /* Mouse position as if in middle of area. */
-  const int loc[2] = {BLI_rcti_cent_x(&area->totrct), BLI_rcti_cent_y(&area->totrct)};
-
   uiItemFullO(layout,
               "SCREEN_OT_area_join",
               IFACE_("Move/Split Area"),
@@ -4957,7 +4954,6 @@ static void screen_area_menu_items(ScrArea *area, uiLayout *layout)
               WM_OP_INVOKE_DEFAULT,
               UI_ITEM_NONE,
               &ptr);
-  RNA_int_set_array(&ptr, "source_xy", loc);
 
   uiItemS(layout);