Remove unused imports

youtube_dl/extractor/ard.py

@@ -8,8 +8,6 @@ from ..utils import (
     determine_ext,
     ExtractorError,
     qualities,
-    compat_urllib_parse_urlparse,
-    compat_urllib_parse,
     int_or_none,
     parse_duration,
     unified_strdate,

youtube_dl/extractor/golem.py

@@ -1,8 +1,6 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-import re
-
 from .common import InfoExtractor
 from ..utils import (
     compat_urlparse,

youtube_dl/extractor/vevo.py

@@ -5,7 +5,6 @@ import xml.etree.ElementTree
 
 from .common import InfoExtractor
 from ..utils import (
-    compat_HTTPError,
     compat_urllib_request,
     ExtractorError,
 )

youtube_dl/extractor/youku.py

@@ -2,7 +2,6 @@
 
 from __future__ import unicode_literals
 
-import json
 import math
 import random
 import re