Geometry Nodes: remove default geometry in bake node

This is sometimes annoying now, because sometimes one wants to bake stuff
without a geometry. Most notably, volume grids. It's still very easy to bake
geometries though. Link-drag-search from a geometry socket still adds the
geometry bake socket automatically.

Pull Request: https://projects.blender.org/blender/blender/pulls/147519

source/blender/nodes/geometry/nodes/node_geo_bake.cc

@@ -95,16 +95,6 @@ static void node_declare(NodeDeclarationBuilder &b)
 static void node_init(bNodeTree * /*tree*/, bNode *node)
 {
   NodeGeometryBake *data = MEM_callocN<NodeGeometryBake>(__func__);
-
-  data->items = MEM_calloc_arrayN<NodeGeometryBakeItem>(1, __func__);
-  data->items_num = 1;
-
-  NodeGeometryBakeItem &item = data->items[0];
-  item.name = BLI_strdup(DATA_("Geometry"));
-  item.identifier = data->next_identifier++;
-  item.attribute_domain = int16_t(AttrDomain::Point);
-  item.socket_type = SOCK_GEOMETRY;
-
   node->storage = data;
 }
 
@@ -522,17 +512,9 @@ static void node_layout_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
 static void node_gather_link_searches(GatherLinkSearchOpParams &params)
 {
   const eNodeSocketDatatype type = eNodeSocketDatatype(params.other_socket().type);
-  if (type == SOCK_GEOMETRY) {
-    params.add_item(IFACE_("Geometry"), [](LinkSearchOpParams &params) {
-      bNode &node = params.add_node("GeometryNodeBake");
-      params.connect_available_socket(node, "Geometry");
-    });
-    return;
-  }
   if (!BakeItemsAccessor::supports_socket_type(type, params.node_tree().type)) {
     return;
   }
-
   params.add_item(
       IFACE_("Value"),
       [type](LinkSearchOpParams &params) {