Plugin cleanup and tweaks

plugins/youtube_download/yt_dlp/extractor/rts.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .srgssr import SRGSSRIE
@@ -15,7 +12,7 @@ from ..utils import (
 )
 
 
-class RTSIE(SRGSSRIE):
+class RTSIE(SRGSSRIE):  # XXX: Do not subclass from concrete IE
     IE_DESC = 'RTS.ch'
     _VALID_URL = r'rts:(?P<rts_id>\d+)|https?://(?:.+?\.)?rts\.ch/(?:[^/]+/){2,}(?P<id>[0-9]+)-(?P<display_id>.+?)\.html'
 
@@ -215,7 +212,6 @@ class RTSIE(SRGSSRIE):
             })
 
         self._check_formats(formats, media_id)
-        self._sort_formats(formats)
 
         duration = info.get('duration') or info.get('cutout') or info.get('cutduration')
         if isinstance(duration, compat_str):