deletes the alternate under file system directory . concode_field_sep String FILE_PATH concode_elem_sep String mAlternateUfsRoot concode_elem_sep String MOUNT_PATH concode_elem_sep String SUB_FILE_PATH concode_elem_sep LocalAlluxioClusterResource mLocalAlluxioClusterResource concode_elem_sep FileSystem mFileSystem concode_elem_sep String SUB_DIR_PATH concode_field_sep void deleteFile concode_elem_sep void openFile concode_elem_sep void before concode_elem_sep void loadMetadata concode_elem_sep void renameFileDst concode_elem_sep void renameFileSrc concode_elem_sep void createFile concode_elem_sep void renameDirectory concode_elem_sep void getFileStatus concode_elem_sep void renameFile concode_elem_sep void createDirectory concode_elem_sep void after concode_elem_sep String createAlternateUfs