code: def clear_alert_destination(self, destination=0, channel=None):
          
          if channel is None:
              channel = self.get_network_channel()
          self.set_alert_destination(
              '0.0.0.0', False, 0, 0, destination, channel)
docs: Clear an alert destination
  
          Remove the specified alert destination configuration.
  
          :param destination:  The destination to clear (defaults to 0)