Remove deprecated io/ioutil (#15707)

docs/debugging/hash-set/main.go

@@ -24,7 +24,6 @@ import (
 	"flag"
 	"fmt"
 	"hash/crc32"
-	"io/ioutil"
 	"log"
 	"os"
 	"strings"
@@ -97,7 +96,7 @@ func main() {
 
 	if file != "" {
 		distrib := make([][]string, setCount)
-		b, err := ioutil.ReadFile(file)
+		b, err := os.ReadFile(file)
 		if err != nil {
 			log.Fatalln(err)
 		}

docs/debugging/healing-bin/main.go

@@ -22,7 +22,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 	"strings"
@@ -79,7 +79,7 @@ FLAGS:
 						return err
 					}
 
-					b, err := ioutil.ReadAll(r)
+					b, err := io.ReadAll(r)
 					if err != nil {
 						return err
 					}
@@ -105,7 +105,7 @@ FLAGS:
 			fmt.Println(string(b))
 			return nil
 		}
-		b, err := ioutil.ReadFile(file)
+		b, err := os.ReadFile(file)
 		if err != nil {
 			return err
 		}

docs/debugging/inspect/main.go

@@ -27,7 +27,6 @@ import (
 	"fmt"
 	"hash/crc32"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"strings"
@@ -49,7 +48,7 @@ func main() {
 			File string `json:"file"`
 			Key  string `json:"key"`
 		}{}
-		got, err := ioutil.ReadAll(os.Stdin)
+		got, err := io.ReadAll(os.Stdin)
 		if err != nil {
 			fatalErr(err)
 		}

docs/debugging/xl-meta/main.go

@@ -25,7 +25,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"strings"
@@ -80,7 +79,7 @@ FLAGS:
 	app.Action = func(c *cli.Context) error {
 		ndjson := c.Bool("ndjson")
 		decode := func(r io.Reader, file string) ([]byte, error) {
-			b, err := ioutil.ReadAll(r)
+			b, err := io.ReadAll(r)
 			if err != nil {
 				return nil, err
 			}
@@ -189,7 +188,7 @@ FLAGS:
 					}
 				}, file)
 				err := data.files(func(name string, data []byte) {
-					err = ioutil.WriteFile(fmt.Sprintf("%s-%s.data", file, name), data, os.ModePerm)
+					err = os.WriteFile(fmt.Sprintf("%s-%s.data", file, name), data, os.ModePerm)
 					if err != nil {
 						fmt.Println(err)
 					}

docs/iam/access-manager-plugin.go

@@ -23,7 +23,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"strings"
@@ -41,7 +41,7 @@ type Result struct {
 }
 
 func mainHandler(w http.ResponseWriter, r *http.Request) {
-	body, err := ioutil.ReadAll(r.Body)
+	body, err := io.ReadAll(r.Body)
 	if err != nil {
 		writeErrorResponse(w, err)
 		return

docs/sts/assume-role.go

@@ -24,7 +24,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/url"
 	"os"
@@ -85,7 +85,7 @@ func main() {
 		if f, err := os.Open(sessionPolicyFile); err != nil {
 			log.Fatalf("Unable to open session policy file: %v", err)
 		} else {
-			bs, err := ioutil.ReadAll(f)
+			bs, err := io.ReadAll(f)
 			if err != nil {
 				log.Fatalf("Error reading session policy file: %v", err)
 			}

docs/sts/ldap.go

@@ -24,7 +24,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/url"
 	"os"
@@ -82,7 +82,7 @@ func main() {
 		if f, err := os.Open(sessionPolicyFile); err != nil {
 			log.Fatalf("Unable to open session policy file: %v", sessionPolicyFile, err)
 		} else {
-			bs, err := ioutil.ReadAll(f)
+			bs, err := io.ReadAll(f)
 			if err != nil {
 				log.Fatalf("Error reading session policy file: %v", err)
 			}