Remove unnecessary pass statements.

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

 # -*- coding: utf-8; -*-
 #
 # Copyright (C) 2009 Google Inc. All rights reserved.
 # Copyright (C) 2009 Torch Mobile Inc.
 # Copyright (C) 2009 Apple Inc. All rights reserved.
 # Copyright (C) 2010 Chris Jerdonek (chris.jerdonek@gmail.com)
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
@@ skipping 702 matching lines @@
         # We provide this function so the caller can pass it to the
         # StyleProcessor constructor.  This lets us assert the equality of
         # the DefaultStyleErrorHandler instance generated by the process()
         # method with an expected instance.
         pass
 
     def _swallow_stderr_message(self, message):
         """Swallow a message passed to stderr.write()."""
         # This is a mock stderr.write() for passing to the constructor
         # of the StyleProcessorConfiguration class.
-        pass
 
     def _create_carriage_checker_class(self):
 
         # Create a reference to self with a new name so its name does not
         # conflict with the self introduced below.
         test_case = self
 
         class MockCarriageChecker(object):
 
             """A mock carriage-return checker."""
@@ skipping 78 matching lines @@
         """Test that carriage returns aren't stripped from files that are allowed to contain them."""
         file_path = 'carriage_returns_allowed.txt'
         lines = ['line1\r', 'line2\r']
         line_numbers = [100]
         self._processor.process(lines=lines,
                                 file_path=file_path,
                                 line_numbers=line_numbers)
         # The carriage return checker should never have been invoked, and so
         # should not have saved off any lines.
         self.assertFalse(hasattr(self.carriage_checker, 'lines'))