Merge pull request #118 from two/master

remove redundant code

tool/kratos-protoc/protoc.go

@@ -101,10 +101,7 @@ func generate(ctx *cli.Context, protoc string) error {
 	cmd.Env = os.Environ()
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
-	if err := cmd.Run(); err != nil {
-		return err
-	}
-	return nil
+	return cmd.Run()
 }
 
 func goget(url string) error {