def unstore(self, key, pk, value):
        """Remove the value/pk from the sorted set index

        For the parameters, see BaseRangeIndex.store

        We simple remove the pk as a member from the sorted set
        """

        self.connection.zrem(key, pk)
Remove the value/pk from the sorted set index

        For the parameters, see BaseRangeIndex.store

        We simple remove the pk as a member from the sorted set