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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def remove_multizone(self, group_uuid):
 """ Stop managing a group """

        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)