Remove unused imports

youtube_dl/extractor/cinchcast.py

@@ -3,7 +3,6 @@ from __future__ import unicode_literals
 
 from .common import InfoExtractor
 from ..utils import (
-    int_or_none,
     unified_strdate,
     xpath_text,
 )

youtube_dl/extractor/pornhd.py

@@ -8,7 +8,6 @@ from ..utils import (
     int_or_none,
     js_to_json,
     qualities,
-    determine_ext,
 )
 
 

youtube_dl/extractor/screenwavemedia.py

@@ -5,9 +5,7 @@ import re
 
 from .common import InfoExtractor
 from ..utils import (
-    ExtractorError,
     int_or_none,
-    month_by_name,
     unified_strdate,
 )
 

youtube_dl/extractor/tvplay.py

@@ -6,7 +6,6 @@ import re
 from .common import InfoExtractor
 from ..compat import compat_str
 from ..utils import (
-    ExtractorError,
     parse_iso8601,
     qualities,
 )