Deletes a connection in uBridge.

        :param port_number: adapter number

def _delete_ubridge_connection(self, port_number):
        """
        Deletes a connection in uBridge.

        :param port_number: adapter number
        """

        bridge_name = "{}-{}".format(self._id, port_number)
        yield from self._ubridge_send("bridge delete {name}".format(name=bridge_name))