'Delete a QoS policy.'

def delete_qos_policy(self, qos_id):

    url = ('/ioclass/' + qos_id)
    data = {'TYPE': '230', 'ID': qos_id}
    result = self.call(url, data, 'DELETE')
    self._assert_rest_result(result, _('Delete    QoS    policy    error.'))
