Shortcut for commands that only remove values from the field.
        Removed values will be deindexed.

def _rem(self, command, *args, **kwargs):
        """
        Shortcut for commands that only remove values from the field.
        Removed values will be deindexed.
        """
        if self.indexable:
            self.deindex(args)
        return self._traverse_command(command, *args, **kwargs)