remove merged back deprecate code

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

pkg/controller/backup_controller.go

@@ -18,7 +18,6 @@ package controller
 
 import (
 	"bytes"
-	"compress/gzip"
 	"context"
 	"fmt"
 	"os"
@@ -576,15 +575,6 @@ func (b *backupReconciler) validateAndGetSnapshotLocations(backup *velerov1api.B
 
 func (b *backupReconciler) runBackup(backup *pkgbackup.Request) error {
 	b.logger.WithField(Backup, kubeutil.NamespaceAndName(backup)).Info("Setting up backup log")
-	logFile, err := os.CreateTemp("", "")
-	if err != nil {
-		return errors.Wrap(err, "error creating temp file for backup log")
-	}
-	gzippedLogFile := gzip.NewWriter(logFile)
-	// Assuming we successfully uploaded the log file, this will have already been closed below. It is safe to call
-	// close multiple times. If we get an error closing this, there's not really anything we can do about it.
-	defer gzippedLogFile.Close()
-	defer closeAndRemoveFile(logFile, b.logger.WithField(Backup, kubeutil.NamespaceAndName(backup)))
 
 	// Log the backup to both a backup log file and to stdout. This will help see what happened if the upload of the
 	// backup log failed for whatever reason.

pkg/controller/backup_finalizer_controller.go

@@ -19,7 +19,6 @@ package controller
 import (
 	"bytes"
 	"context"
-	"io/ioutil"
 	"os"
 
 	"github.com/pkg/errors"
@@ -146,7 +145,7 @@ func (r *backupFinalizerReconciler) Reconcile(ctx context.Context, req ctrl.Requ
 			return ctrl.Result{}, errors.Wrap(err, "error downloading backup")
 		}
 		defer closeAndRemoveFile(inBackupFile, log)
-		outBackupFile, err = ioutil.TempFile("", "")
+		outBackupFile, err = os.CreateTemp("", "")
 		if err != nil {
 			log.WithError(err).Error("error creating temp file for backup")
 			return ctrl.Result{}, errors.WithStack(err)

pkg/util/logging/dual_mode_logger.go

@@ -19,7 +19,6 @@ package logging
 import (
 	"compress/gzip"
 	"io"
-	"io/ioutil"
 	"os"
 
 	"github.com/pkg/errors"
@@ -47,7 +46,7 @@ type tempFileLogger struct {
 
 // NewTempFileLogger creates a DualModeLogger instance that writes logs to both Stdout and a file in the temp folder.
 func NewTempFileLogger(logLevel logrus.Level, logFormat Format, hook *LogHook, fields logrus.Fields) (DualModeLogger, error) {
-	file, err := ioutil.TempFile("", "")
+	file, err := os.CreateTemp("", "")
 	if err != nil {
 		return nil, errors.Wrap(err, "error creating temp file")
 	}