Plugin cleanup and tweaks

plugins/youtube_download/yt_dlp/extractor/platzi.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..compat import (
     compat_b64decode,
@@ -22,14 +19,7 @@ class PlatziBaseIE(InfoExtractor):
     _LOGIN_URL = 'https://platzi.com/login/'
     _NETRC_MACHINE = 'platzi'
 
-    def _real_initialize(self):
-        self._login()
-
-    def _login(self):
-        username, password = self._get_login_info()
-        if username is None:
-            return
-
+    def _perform_login(self, username, password):
         login_page = self._download_webpage(
             self._LOGIN_URL, None, 'Downloading login page')
 
@@ -137,7 +127,6 @@ class PlatziIE(PlatziBaseIE):
                         format_url, lecture_id, mpd_id=format_id,
                         note='Downloading %s MPD manifest' % server_id,
                         fatal=False))
-        self._sort_formats(formats)
 
         content = str_or_none(desc.get('content'))
         description = (clean_html(compat_b64decode(content).decode('utf-8'))