diff --git a/youtube_dl/extractor/ard.py b/youtube_dl/extractor/ard.py
index 54cec1c2fe..8de9c11eae 100644
--- a/youtube_dl/extractor/ard.py
+++ b/youtube_dl/extractor/ard.py
@@ -8,8 +8,6 @@
     determine_ext,
     ExtractorError,
     qualities,
-    compat_urllib_parse_urlparse,
-    compat_urllib_parse,
     int_or_none,
     parse_duration,
     unified_strdate,
diff --git a/youtube_dl/extractor/golem.py b/youtube_dl/extractor/golem.py
index a237f19ee3..bebfe85687 100644
--- a/youtube_dl/extractor/golem.py
+++ b/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,
diff --git a/youtube_dl/extractor/vevo.py b/youtube_dl/extractor/vevo.py
index ebab8b86c6..5b1a3ec787 100644
--- a/youtube_dl/extractor/vevo.py
+++ b/youtube_dl/extractor/vevo.py
@@ -5,7 +5,6 @@
 
 from .common import InfoExtractor
 from ..utils import (
-    compat_HTTPError,
     compat_urllib_request,
     ExtractorError,
 )
diff --git a/youtube_dl/extractor/youku.py b/youtube_dl/extractor/youku.py
index 07ed7cbd19..48d47a2455 100644
--- a/youtube_dl/extractor/youku.py
+++ b/youtube_dl/extractor/youku.py
@@ -2,7 +2,6 @@
 
 from __future__ import unicode_literals
 
-import json
 import math
 import random
 import re