Remove (ifdef) RNA for simulation, point cloud and particles

For 2.90 release this should not be exposed in the RNA API.

In master this needs to be ON by default, that's all.

Differential Revision: https://developer.blender.org/D8589

source/blender/makesrna/intern/rna_space.c

@@ -2181,6 +2181,7 @@ static void rna_SpaceNodeEditor_node_tree_update(const bContext *C, PointerRNA *
   ED_node_tree_update(C);
 }
 
+#  ifdef WITH_PARTICLE_NODES
 static PointerRNA rna_SpaceNodeEditor_simulation_get(PointerRNA *ptr)
 {
   SpaceNode *snode = (SpaceNode *)ptr->data;
@@ -2212,6 +2213,7 @@ static void rna_SpaceNodeEditor_simulation_set(PointerRNA *ptr,
   }
   snode->id = &sim->id;
 }
+#  endif
 
 static int rna_SpaceNodeEditor_tree_type_get(PointerRNA *ptr)
 {
@@ -6266,6 +6268,7 @@ static void rna_def_space_node(BlenderRNA *brna)
   RNA_def_property_ui_text(
       prop, "ID From", "Data-block from which the edited data-block is linked");
 
+#  ifdef WITH_PARTICLE_NODES
   prop = RNA_def_property(srna, "simulation", PROP_POINTER, PROP_NONE);
   RNA_def_property_flag(prop, PROP_EDITABLE);
   RNA_def_property_struct_type(prop, "Simulation");
@@ -6276,6 +6279,7 @@ static void rna_def_space_node(BlenderRNA *brna)
                                  NULL,
                                  NULL);
   RNA_def_property_update(prop, NC_SPACE | ND_SPACE_NODE, NULL);
+#  endif
 
   prop = RNA_def_property(srna, "path", PROP_COLLECTION, PROP_NONE);
   RNA_def_property_collection_sdna(prop, NULL, "treepath", NULL);