chore: remove refs to deprecated io/ioutil (#3811)

Signed-off-by: guoguangwu <guoguangwu@magic-shield.com>

internal/api/genapi/templates.go

@@ -6,7 +6,6 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -173,7 +172,7 @@ func fillTemplates() {
 		if _, err := os.Stat(outDir); os.IsNotExist(err) {
 			_ = os.Mkdir(outDir, os.ModePerm)
 		}
-		if err := ioutil.WriteFile(outFile, outBuf.Bytes(), 0o644); err != nil {
+		if err := os.WriteFile(outFile, outBuf.Bytes(), 0o644); err != nil {
 			fmt.Printf("error writing file %q: %v\n", outFile, err)
 			os.Exit(1)
 		}
@@ -216,7 +215,7 @@ func fillTemplates() {
 		if _, err := os.Stat(outDir); os.IsNotExist(err) {
 			_ = os.Mkdir(outDir, os.ModePerm)
 		}
-		if err := ioutil.WriteFile(outFile, outBuf.Bytes(), 0o644); err != nil {
+		if err := os.WriteFile(outFile, outBuf.Bytes(), 0o644); err != nil {
 			fmt.Printf("error writing file %q: %v\n", outFile, err)
 			os.Exit(1)
 		}

internal/cmd/gencli/templates.go

@@ -3,7 +3,6 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"text/template"
@@ -36,7 +35,7 @@ func fillTemplates() {
 			if _, err := os.Stat(outDir); os.IsNotExist(err) {
 				_ = os.Mkdir(outDir, os.ModePerm)
 			}
-			if err := ioutil.WriteFile(outFile, outBuf.Bytes(), 0o644); err != nil {
+			if err := os.WriteFile(outFile, outBuf.Bytes(), 0o644); err != nil {
 				fmt.Printf("error writing file %q: %v\n", outFile, err)
 				os.Exit(1)
 			}

internal/tests/api/testing.go

@@ -5,7 +5,7 @@ package api
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
 	"reflect"
 	"testing"
 
@@ -19,7 +19,7 @@ import (
 // name
 func CloudEventFromFile(t testing.TB, fileName string) *cloudevents.Event {
 	t.Helper()
-	b, err := ioutil.ReadFile(fileName)
+	b, err := os.ReadFile(fileName)
 	assert.NoError(t, err)
 	got := &cloudevents.Event{}
 	err = json.Unmarshal(b, got)

internal/website/permstable/permstable.go

@@ -5,7 +5,6 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"sort"
 	"strings"
@@ -84,7 +83,7 @@ func main() {
 		worker,
 	)
 
-	fileContents, err := ioutil.ReadFile(permsFile)
+	fileContents, err := os.ReadFile(permsFile)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
@@ -120,7 +119,7 @@ func main() {
 		strings.Join(table.Marshal(), "\n"),
 		strings.Join(post, "\n"))
 
-	if err := ioutil.WriteFile(permsFile, []byte(final), 0o644); err != nil {
+	if err := os.WriteFile(permsFile, []byte(final), 0o644); err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}