about: improved error message

backend/putio/fs.go

@@ -647,7 +647,7 @@ func (f *Fs) About(ctx context.Context) (usage *fs.Usage, err error) {
 		return shouldRetry(ctx, err)
 	})
 	if err != nil {
-		return nil, fmt.Errorf("about failed: %w", err)
+		return nil, err
 	}
 	return &fs.Usage{
 		Total: fs.NewUsageValue(ai.Disk.Size),  // quota of bytes that can be used