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_attribute,
     get_element_by_id,
     orderedSet,
     str_to_int,

youtube_dl/extractor/morningstar.py

@@ -1,17 +1,9 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-import hashlib
-import json
 import re
-import time
 
 from .common import InfoExtractor
-from ..utils import (
-    compat_parse_qs,
-    compat_str,
-    int_or_none,
-)
 
 
 class MorningstarIE(InfoExtractor):

youtube_dl/extractor/yahoo.py

@@ -1,6 +1,7 @@
 from __future__ import unicode_literals
 
 import itertools
+import json
 import re
 
 from .common import InfoExtractor, SearchInfoExtractor