[twitch] remove rechat.twitch.tv as a subtitle source

youtube_dl/extractor/twitch.py

@@ -310,18 +310,6 @@ class TwitchVodIE(TwitchItemBaseIE):
         if 't' in query:
             info['start_time'] = parse_duration(query['t'][0])
 
-        if info.get('timestamp') is not None:
-            info['subtitles'] = {
-                'rechat': [{
-                    'url': update_url_query(
-                        'https://rechat.twitch.tv/rechat-messages', {
-                            'video_id': 'v%s' % item_id,
-                            'start': info['timestamp'],
-                        }),
-                    'ext': 'json',
-                }],
-            }
-
         return info