[4tube] Fix import

youtube_dl/extractor/fourtube.py

@@ -8,8 +8,8 @@ from ..utils import (
     unified_strdate,
     str_to_int,
     parse_duration,
+    clean_html,
 )
-from youtube_dl.utils import clean_html
 
 
 class FourTubeIE(InfoExtractor):