remove template func RegisterXXXServer() unused param opts []grpc.DialOption

protoc-gen-grpc-gateway/gengateway/template.go

@@ -546,7 +546,7 @@ func local_request_{{.Method.Service.GetName}}_{{.Method.GetName}}_{{.Index}}(ct
 // Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}Server registers the http handlers for service {{$svc.GetName}} to "mux".
 // UnaryRPC     :call {{$svc.GetName}}Server directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
-func Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}Server(ctx context.Context, mux *runtime.ServeMux, server {{$svc.GetName}}Server, opts []grpc.DialOption) error {
+func Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}Server(ctx context.Context, mux *runtime.ServeMux, server {{$svc.GetName}}Server) error {
 	{{range $m := $svc.Methods}}
 	{{range $b := $m.Bindings}}
 	{{if or $m.GetClientStreaming $m.GetServerStreaming}}

protoc-gen-grpc-gateway/gengateway/template_test.go

@@ -570,7 +570,7 @@ func TestApplyTemplateInProcess(t *testing.T) {
 			}
 		}
 
-		if want := `func RegisterExampleServiceHandlerServer(ctx context.Context, mux *runtime.ServeMux, server ExampleServiceServer, opts []grpc.DialOption) error {`; !strings.Contains(got, want) {
+		if want := `func RegisterExampleServiceHandlerServer(ctx context.Context, mux *runtime.ServeMux, server ExampleServiceServer) error {`; !strings.Contains(got, want) {
 			t.Errorf("applyTemplate(%#v) = %s; want to contain %s", file, got, want)
 		}
 	}