# File lib/openstack/network/qos_policy.rb, line 71
    def remove_port_id(port_id)
      data = JSON.generate(:port => {:qos_policy_id => nil})
      response = @connection.req("PUT", "/ports/#{port_id}", {:data => data})
      OpenStack::Exception.raise_exception(response) unless response.code.match(/^20.$/)
      true
    end