Remove unused imports in webkitpy with using autoflake.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/linux.py

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 import logging
-import re
 
 from webkitpy.common.webkit_finder import WebKitFinder
 from webkitpy.layout_tests.breakpad.dump_reader_multipart import DumpReaderLinux
 from webkitpy.layout_tests.models import test_run_results
 from webkitpy.layout_tests.port import base
 from webkitpy.layout_tests.port import win
 from webkitpy.layout_tests.port import config
 
 
 _log = logging.getLogger(__name__)
@@ skipping 79 matching lines @@
 
     def _wdiff_missing_message(self):
         return 'wdiff is not installed; please install using "sudo apt-get install wdiff"'
 
     def _path_to_driver(self, target=None):
         binary_name = self.driver_name()
         return self._build_path_with_target(target, binary_name)
 
     def _path_to_helper(self):
         return None