[Codemod][FBSourceBlackLinter] Daily `arc lint --take BLACK`

Reviewed By: zertosh

Differential Revision: D33307283

fbshipit-source-id: 55a95689b8c20b17b7c882070bc3e24706c44444

torchaudio/prototype/ctc_decoder/ctc_decoder.py

 import itertools as it
 from collections import namedtuple
+from typing import Dict
 from typing import List, Optional
 
 import torch
@@ -14,7 +15,6 @@ from torchaudio._torchaudio_decoder import (
     _create_word_dict,
     _load_words,
 )
-from typing import Dict
 
 
 __all__ = ["KenLMLexiconDecoder", "kenlm_lexicon_decoder"]