Plugin cleanup and tweaks

plugins/youtube_download/yt_dlp/extractor/damtomo.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor
@@ -39,7 +36,6 @@ class DamtomoBaseIE(InfoExtractor):
         if not m3u8_url:
             raise ExtractorError('Failed to obtain m3u8 URL')
         formats = self._extract_m3u8_formats(m3u8_url, video_id, ext='mp4')
-        self._sort_formats(formats)
 
         return {
             'id': video_id,