Remove unused methods in webkitpy/layout_tests/.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/models/test_expectations.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 953 matching lines @@
         drop any failures that the sanitizers don't care about.
         """
         expected_results = expected_results.copy()
         for result in (IMAGE, FAIL, IMAGE_PLUS_TEXT):
             if result in expected_results:
                 expected_results.remove(result)
                 expected_results.add(PASS)
         return expected_results
 
     @staticmethod
-    def has_pixel_failures(actual_results):
-        return IMAGE in actual_results or FAIL in actual_results
-
-    @staticmethod
     def suffixes_for_expectations(expectations):
         suffixes = set()
         if IMAGE in expectations:
             suffixes.add('png')
         if FAIL in expectations:
             suffixes.add('txt')
             suffixes.add('png')
             suffixes.add('wav')
         return set(suffixes)
 
@@ skipping 218 matching lines @@
             # If reconstitute_only_these is an empty list, we want to return original_string.
             # So we need to compare reconstitute_only_these to None, not just check if it's falsey.
             if reconstitute_only_these is None or expectation_line in reconstitute_only_these:
                 return expectation_line.to_string(test_configuration_converter)
             return expectation_line.original_string
 
         def nones_out(expectation_line):
             return expectation_line is not None
 
         return '\n'.join(filter(nones_out, map(serialize, expectation_lines)))