code: async def delete_port_mapping(self, external_port: int, protocol: str) -> None:
          
          return await self.gateway.commands.DeletePortMapping(
              NewRemoteHost="", NewExternalPort=external_port, NewProtocol=protocol
          )
docs: :param external_port: (int) external port to listen on
          :param protocol:      (str) 'UDP' | 'TCP'
          :return: None