chore: remove refs to deprecated io/ioutil

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

tar/asm/assemble_test.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"hash/crc64"
 	"io"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -232,7 +231,7 @@ func BenchmarkAsm(b *testing.B) {
 					b.Fatal(err)
 				}
 				// read it all to the bit bucket
-				i1, err := io.Copy(ioutil.Discard, tarStream)
+				i1, err := io.Copy(io.Discard, tarStream)
 				if err != nil {
 					b.Fatal(err)
 				}
@@ -243,7 +242,7 @@ func BenchmarkAsm(b *testing.B) {
 
 				rc := NewOutputTarStream(fgp, sup)
 
-				i2, err := io.Copy(ioutil.Discard, rc)
+				i2, err := io.Copy(io.Discard, rc)
 				if err != nil {
 					b.Fatal(err)
 				}

tar/asm/disassemble_test.go

@@ -4,7 +4,6 @@ import (
 	"archive/tar"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -52,14 +51,14 @@ func TestLargeJunkPadding(t *testing.T) {
 	}()
 
 	// Disassemble our junk file.
-	nilPacker := storage.NewJSONPacker(ioutil.Discard)
+	nilPacker := storage.NewJSONPacker(io.Discard)
 	rdr, err := NewInputTarStream(pR, nilPacker, nil)
 	if err != nil {
 		t.Fatal(err)
 	}
 
 	// Copy the entire rdr.
-	_, err = io.Copy(ioutil.Discard, rdr)
+	_, err = io.Copy(io.Discard, rdr)
 	if err != nil {
 		t.Fatal(err)
 	}

tar/storage/getter_test.go

@@ -3,7 +3,7 @@ package storage
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 )
@@ -31,7 +31,7 @@ func TestGetter(t *testing.T) {
 			if err != nil {
 				t.Error(err)
 			}
-			buf, err := ioutil.ReadAll(r)
+			buf, err := io.ReadAll(r)
 			if err != nil {
 				t.Error(err)
 			}

tar/storage/packer_test.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"compress/gzip"
 	"io"
-	"io/ioutil"
 	"os"
 	"testing"
 )
@@ -186,7 +185,7 @@ func BenchmarkGetPut(b *testing.B) {
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
 			func() {
-				fh, err := ioutil.TempFile("", "tar-split.")
+				fh, err := os.CreateTemp("", "tar-split.")
 				if err != nil {
 					b.Fatal(err)
 				}