server/prpc: updated server according to protocol

server/prpc/service.go

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package prpc
 
 import (
         "google.golang.org/grpc"
 )
 
 type service struct {
         desc    *grpc.ServiceDesc
         methods map[string]*method
         impl    interface{}
 }
-
-func (s *service) Name() string {
-        return s.desc.ServiceName
-}