def METHOD_NAME(self, model_id, env):
    if self._table is None:
        return
    sql = """
    DELETE FROM {0}
        WHERE model_id = '{1}' AND env = '{2}'
    """.format(
        self._table, model_id, env
    )
    conn = self._connect()
    c = conn.cursor()
    c.execute(sql)
    conn.commit()
    conn.close()