Remove unused imports in webkitpy with using autoflake.

third_party/WebKit/Tools/Scripts/webkitpy/style/filereader_unittest.py

 # Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
 #
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 # 1.  Redistributions of source code must retain the above copyright
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 #     notice, this list of conditions and the following disclaimer in the
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 #
 # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 # DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
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-import unittest
 
 from webkitpy.common.system.filesystem import FileSystem
 from webkitpy.common.system.logtesting import LoggingTestCase
 from webkitpy.style.checker import ProcessorBase
 from webkitpy.style.filereader import TextFileReader
 
 
 class TextFileReaderTest(LoggingTestCase):
 
     class MockProcessor(ProcessorBase):
@@ skipping 112 matching lines @@
 
         self._file_reader.process_paths([dir, file_path1])
         processed = [(['bar'], file_path2, None),
                      (['foo'], file_path1, None)]
         self._assert_file_reader(processed, 2)
 
     def test_count_delete_only_file(self):
         self._file_reader.count_delete_only_file()
         delete_only_file_count = self._file_reader.delete_only_file_count
         self.assertEqual(delete_only_file_count, 1)