Remove extraneous log prefix changes

repository_restic.go

@@ -369,9 +369,8 @@ type resticMessage struct {
 
 // Scan the output of 'restic backup' for the snapshot ID. Modifies backup/dataset objects.
 func (r *resticRepository) RunBackup(ctx context.Context, shell *Shell, backup *Backup, ds *Dataset, cmd string) error {
-	logPrefix := fmt.Sprintf("backup=%s dataset=%s", backup.ID, ds.ID)
 	return active.WithResticStatus(jobs.GetID(ctx), backup, ds, func(progressCh chan *resticStatusMessage) error {
-		return shell.RunWithStdoutCallback(ctx, cmd, logPrefix, func(line []byte) {
+		return shell.RunWithStdoutCallback(ctx, cmd, func(line []byte) {
 			var msg resticMessage
 			if err := json.Unmarshal(line, &msg); err != nil {
 				log.Printf("error parsing restic JSON message: %v (%s)", err, line)