docs: 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))