Plugin cleanup and tweaks

plugins/youtube_download/yt_dlp/extractor/scte.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor
@@ -14,14 +12,7 @@ class SCTEBaseIE(InfoExtractor):
     _LOGIN_URL = 'https://www.scte.org/SCTE/Sign_In.aspx'
     _NETRC_MACHINE = 'scte'
 
-    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_popup = self._download_webpage(
             self._LOGIN_URL, None, 'Downloading login popup')