Remove unused imports

youtube_dl/extractor/addanime.py

@@ -1,4 +1,3 @@
-import ast
 import re
 
 from .common import InfoExtractor

youtube_dl/extractor/appletrailers.py

@@ -4,7 +4,6 @@ import xml.etree.ElementTree
 from .common import InfoExtractor
 from ..utils import (
     determine_ext,
-    ExtractorError,
 )
 
 

youtube_dl/extractor/trilulilu.py

@@ -3,9 +3,6 @@ import re
 import xml.etree.ElementTree
 
 from .common import InfoExtractor
-from ..utils import (
-    ExtractorError,
-)
 
 
 class TriluliluIE(InfoExtractor):

youtube_dl/extractor/wat.py

@@ -6,7 +6,6 @@ import re
 from .common import InfoExtractor
 
 from ..utils import (
-    compat_urllib_parse,
     unified_strdate,
 )