Remove unused imports

youtube_dl/extractor/dailymotion.py

@@ -8,7 +8,6 @@ from .subtitles import SubtitlesInfoExtractor
 from ..utils import (
     compat_urllib_request,
     compat_str,
-    get_element_by_id,
     orderedSet,
     str_to_int,
     int_or_none,

youtube_dl/extractor/extremetube.py

@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-import os
 import re
 
 from .common import InfoExtractor

youtube_dl/extractor/teamcoco.py

@@ -3,9 +3,6 @@ from __future__ import unicode_literals
 import re
 
 from .common import InfoExtractor
-from ..utils import (
-    ExtractorError,
-)
 
 
 class TeamcocoIE(InfoExtractor):