remove useless code in go_restful_server.go

protocol/rest/server/server_impl/go_restful_server.go

@@ -99,8 +99,6 @@ func (grs *GoRestfulServer) Deploy(restMethodConfig *config.RestMethodConfig, ro
 
 // Delete a http api in go-restful server
 func (grs *GoRestfulServer) UnDeploy(restMethodConfig *config.RestMethodConfig) {
-	ws := new(restful.WebService)
-	ws.Path(restMethodConfig.Path)
 	err := grs.ws.RemoveRoute(restMethodConfig.Path, restMethodConfig.MethodType)
 	if err != nil {
 		logger.Warnf("[Go restful] Remove web service error:%v", err)