Required functionality.

def delete(self, obj):
        """Required functionality."""
        del_id = obj.get_id()
        if not del_id:
            return

        cur = self._conn().cursor()

        tabname = obj.__class__.get_table_name()
        query = 'delete from %s where id = ?' % tabname
        cur.execute(query, (del_id,))

        self._conn().commit()
        cur.close()