xl: Remove non needed check for empty dir (#11835)

RenameData renames xl.meta and data dir and removes the parent directory
if empty, however, there is a duplicate check for empty dir, since the
parent dir of xl.meta is always the same as the data-dir.

cmd/xl-storage.go

@@ -1977,12 +1977,6 @@ func (s *xlStorage) RenameData(ctx context.Context, srcVolume, srcPath, dataDir,
 		s.deleteFile(srcVolumeDir, parentDir, false)
 	}
 
-	if srcDataPath != "" {
-		if parentDir := pathutil.Dir(srcDataPath); isDirEmpty(parentDir) {
-			s.deleteFile(srcVolumeDir, parentDir, false)
-		}
-	}
-
 	return nil
 }