Plugin cleanup and tweaks

plugins/youtube_download/yt_dlp/extractor/kuwo.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor
@@ -107,7 +104,6 @@ class KuwoIE(KuwoBaseIE):
             lrc_content = None
 
         formats = self._get_formats(song_id)
-        self._sort_formats(formats)
 
         album_id = self._html_search_regex(
             r'<a[^>]+href="http://www\.kuwo\.cn/album/(\d+)/"',
@@ -342,8 +338,6 @@ class KuwoMvIE(KuwoBaseIE):
             'format_id': 'mv',
         })
 
-        self._sort_formats(formats)
-
         return {
             'id': song_id,
             'title': song_name,