code: def del_contact_downtime(self, downtime_id):
          
          for item in self.daemon.contacts:
              if downtime_id in item.downtimes:
                  item.downtimes[downtime_id].cancel(self.daemon.contacts)
                  break
          else:
              self.send_an_element(make_monitoring_log(
                  'warning', 'DEL_CONTACT_DOWNTIME: downtime id: %s does not exist '
                             'and cannot be deleted.' % downtime_id))
docs: Delete a contact downtime
          Format of the line that triggers function call::
  
          DEL_CONTACT_DOWNTIME;<downtime_id>
  
          :param downtime_id: downtime id to delete
          :type downtime_id: int
          :return: None