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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def delete(self, port, qos_policy=None):
 """Remove QoS rules from port. :param port: port object. :param qos_policy: the QoS policy to be removed from port. """

        LOG.info("Deleting QoS policy %(qos_policy)s on port %(port)s",
                 dict(qos_policy=qos_policy, port=port))

        self._utils.remove_port_qos_rule(port["port_id"])