def switch_delete_record_for_nic(self, userid, interface):
        """Remove userid switch record from switch table."""
        with get_network_conn() as conn:
            conn.execute("DELETE FROM switch WHERE userid=? and interface=?",
                         (userid, interface))
            LOG.debug("Switch record for user %s with nic %s is removed from "
                      "switch table" % (userid, interface))