Revert "[commonmistakes] Disable UnicodeBOM extractor test for python 3.2"

This reverts commit 2cc7fcd338.

youtube_dl/extractor/commonmistakes.py

@@ -1,7 +1,5 @@
 from __future__ import unicode_literals
 
-import sys
-
 from .common import InfoExtractor
 from ..utils import ExtractorError
 
@@ -35,9 +33,7 @@ class UnicodeBOMIE(InfoExtractor):
         IE_DESC = False
         _VALID_URL = r'(?P<bom>\ufeff)(?P<id>.*)$'
 
-        # Disable test for python 3.2 since BOM is broken in re in this version
-        # (see https://github.com/rg3/youtube-dl/issues/9751)
-        _TESTS = [] if (3, 0) < sys.version_info <= (3, 3) else [{
+        _TESTS = [{
             'url': '\ufeffhttp://www.youtube.com/watch?v=BaW_jenozKc',
             'only_matching': True,
         }]