chore: remove refs to deprecated io/ioutil (#116)

Signed-off-by: guoguangwu <[email protected]>

audit_test.go

@@ -3,7 +3,6 @@ package main
 import (
 	"compress/flate"
 	"errors"
-	"io/ioutil"
 	"log/syslog"
 	"net"
 	"os"
@@ -588,7 +587,7 @@ func (t *noopWriter) Write(a []byte) (int, error) {
 
 func createTempFile(t *testing.T, name string, contents string) string {
 	file := os.TempDir() + string(os.PathSeparator) + "go-audit." + name
-	if err := ioutil.WriteFile(file, []byte(contents), os.FileMode(0644)); err != nil {
+	if err := os.WriteFile(file, []byte(contents), os.FileMode(0644)); err != nil {
 		t.Fatal("Failed to create temp file", err)
 	}
 	return file

extras_containers_capsule8.go

@@ -29,7 +29,7 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strconv"
 	"strings"
 )
@@ -68,7 +68,7 @@ func processContainerID(pid int) (string, error) {
 // TaskControlGroups returns the cgroup membership of the specified task.
 func taskControlGroups(tgid, pid int) ([]controlGroup, error) {
 	filename := fmt.Sprintf("/proc/%d/task/%d/cgroup", tgid, pid)
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}