[WorldObject] Code and doc cleanup

src/pycram/world_concepts/world_object.py

@@ -575,10 +575,8 @@ def set_attachments(self, attachments: Dict[Object, Attachment]) -> None:
         """
         for obj, attachment in attachments.items():
             if self.world.is_prospection_world and not obj.world.is_prospection_world:
-                # The object mapping is directly used since this function can be called from the world sync thread which
-                # would cause a deadlock when calling get_prospection_object_for_object.
-                # Furthermore, all attached objects are spawned beforehand so no keyError should occur
-                # obj = self.world.world_sync.object_mapping[obj]
+                # In case this object is in the prospection world and the other object is not, the attachment will no
+                # be set.
                 continue
             if obj in self.attachments:
                 if self.attachments[obj] != attachment: