Cleanup: remove disabled code from property lookup

This allowed custom ID-properties to share a name-space
with regular properties which won't work well as the names may collide.

source/blender/makesrna/intern/rna_rna.c

@@ -458,29 +458,6 @@ int rna_builtin_properties_lookup_string(PointerRNA *ptr, const char *key, Point
       }
     }
   } while ((srna = srna->base));
-
-  /* this was used pre 2.5beta0, now ID property access uses python's
-   * getitem style access
-   * - ob["foo"] rather than ob.foo */
-#  if 0
-  if (ptr->data) {
-    IDProperty *group, *idp;
-
-    group = RNA_struct_idprops(ptr, 0);
-
-    if (group) {
-      for (idp = group->data.group.first; idp; idp = idp->next) {
-        if (STREQ(idp->name, key)) {
-          propptr.type = &RNA_Property;
-          propptr.data = idp;
-
-          *r_ptr = propptr;
-          return true;
-        }
-      }
-    }
-  }
-#  endif
   return false;
 }