[cleanup] Remove dead extractors (#16137)

Closes #2623
Closes #2679
Closes #2821
Closes #3416
Closes #4828
Closes #4939
Closes #5421
Closes #7064
Closes #7264
Closes #7654
Closes #8075
Closes #8798
Closes #9313
Closes #9617
Closes #10162
Closes #10252
Closes #10264
Closes #15640

Authored by: doe1080, bashonly

Co-authored-by: bashonly <88596187+bashonly@users.noreply.github.com>

yt_dlp/extractor/vgtv.py

@@ -1,7 +1,6 @@
 import re
 
 from .common import InfoExtractor
-from .xstream import XstreamIE
 from ..utils import (
     ExtractorError,
     float_or_none,
@@ -9,7 +8,8 @@ from ..utils import (
 )
 
 
-class VGTVIE(XstreamIE):  # XXX: Do not subclass from concrete IE
+class VGTVIE(InfoExtractor):
+    _WORKING = False
     IE_DESC = 'VGTV, BTTV, FTV, Aftenposten and Aftonbladet'
     _GEO_BYPASS = False