delete io/ioutil package. (#5955)

Signed-off-by: yanggang <gang.yang@daocloud.io>

pkg/plugin/clientmgmt/process/registry_test.go

@@ -5,7 +5,7 @@ Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
-    http://www.apache.org/licenses/LICENSE-2.0
+	http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
@@ -16,6 +16,7 @@ limitations under the License.
 package process
 
 import (
+	"io/fs"
 	"os"
 	"sort"
 	"testing"
@@ -43,7 +44,7 @@ func TestNewRegistry(t *testing.T) {
 }
 
 type fakeFileInfo struct {
-	os.FileInfo
+	fs.FileInfo
 	mode os.FileMode
 }
 

pkg/plugin/clientmgmt/restartable_object_store_test.go

@@ -17,7 +17,7 @@ limitations under the License.
 package clientmgmt
 
 import (
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 	"time"
@@ -208,7 +208,7 @@ func TestRestartableObjectStoreDelegatedFunctions(t *testing.T) {
 			Function:                "GetObject",
 			Inputs:                  []interface{}{"bucket", "key"},
 			ExpectedErrorOutputs:    []interface{}{nil, errors.Errorf("reset error")},
-			ExpectedDelegateOutputs: []interface{}{ioutil.NopCloser(strings.NewReader("object")), errors.Errorf("delegate error")},
+			ExpectedDelegateOutputs: []interface{}{io.NopCloser(strings.NewReader("object")), errors.Errorf("delegate error")},
 		},
 		restartabletest.RestartableDelegateTest{
 			Function:                "ListCommonPrefixes",

pkg/plugin/framework/stream_reader_test.go

@@ -18,7 +18,7 @@ package framework
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -59,7 +59,7 @@ func TestStreamReader(t *testing.T) {
 		close:   rdr.CloseSend,
 	}
 
-	res, err := ioutil.ReadAll(sr)
+	res, err := io.ReadAll(sr)
 
 	require.Nil(t, err)
 	assert.Equal(t, s, string(res))