code: def remove_multizone(self, group_uuid):
          
          group_uuid = str(group_uuid)
          group = self._groups.pop(group_uuid, None)
          # Inform all group members that they are no longer members
          if group is not None:
              group['listener']._mz.reset_members()  # noqa: E501 pylint: disable=protected-access
          for member in self._casts.values():
              member['groups'].discard(group_uuid)
docs: Stop managing a group