[cleanup] Mark broken and remove dead extractors (#9238)

Authored by: seproDev

yt_dlp/extractor/dtube.py

@@ -9,6 +9,7 @@ from ..utils import (
 
 
 class DTubeIE(InfoExtractor):
+    _WORKING = False
     _VALID_URL = r'https?://(?:www\.)?d\.tube/(?:#!/)?v/(?P<uploader_id>[0-9a-z.-]+)/(?P<id>[0-9a-z]{8})'
     _TEST = {
         'url': 'https://d.tube/#!/v/broncnutz/x380jtr1',