Remove the instance tied to the field for the given "value" (via `args`) from the index

        For the parameters, see ``BaseIndex.remove``

        Notes
        -----
        This method calls the ``unstore`` method that should be overridden in subclasses
        to remove data from the index sorted-set key

def remove(self, *args):
        """Remove the instance tied to the field for the given "value" (via `args`) from the index

        For the parameters, see ``BaseIndex.remove``

        Notes
        -----
        This method calls the ``unstore`` method that should be overridden in subclasses
        to remove data from the index sorted-set key

        """

        key = self.get_storage_key(*args)

        args = list(args)
        value = args[-1]

        pk = self.instance.pk.get()
        logger.debug("removing %s from index %s" % (pk, key))
        self.unstore(key, pk, self.prepare_value_for_storage(value, pk))
        self._deindexed_values.add(tuple(args))