io/ioutil deprecated (#3217)

tools/goctl/rpc/generator/genconfig.go

@@ -2,7 +2,6 @@ package generator
 
 import (
 	_ "embed"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -36,5 +35,5 @@ func (g *Generator) GenConfig(ctx DirContext, _ parser.Proto, cfg *conf.Config)
 		return err
 	}
 
-	return ioutil.WriteFile(fileName, []byte(text), os.ModePerm)
+	return os.WriteFile(fileName, []byte(text), os.ModePerm)
 }

tools/goctl/rpc/generator/genpb_test.go

@@ -1,7 +1,6 @@
 package generator
 
 import (
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -14,7 +13,7 @@ import (
 func Test_findPbFile(t *testing.T) {
 	dir := t.TempDir()
 	protoFile := filepath.Join(dir, "greet.proto")
-	err := ioutil.WriteFile(protoFile, []byte(`
+	err := os.WriteFile(protoFile, []byte(`
 syntax = "proto3";
 
 package greet;