Remove unused methods in webkitpy/layout_tests/.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/views/printing_unittest.py

 # Copyright (C) 2010, 2012 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 61 matching lines @@
 
 class FakeShard(object):
 
     def __init__(self, shard_name, total_run_time):
         self.shard_name = shard_name
         self.total_run_time = total_run_time
 
 
 class Testprinter(unittest.TestCase):
 
-    def assertEmpty(self, stream):
-        self.assertFalse(stream.getvalue())
-
     def assertNotEmpty(self, stream):
         self.assertTrue(stream.getvalue())
 
     def assertWritten(self, stream, contents):
         self.assertEqual(stream.buflist, contents)
 
     def reset(self, stream):
         stream.buflist = []
         stream.buf = ''
 
@@ skipping 155 matching lines @@
         printer.print_finished_test(result, expected=True, exp_str='', got_str='')
 
         printer.print_started_test('passes/text.html')
         result = self.get_result('passes/text.html')
         printer.print_finished_test(result, expected=True, exp_str='', got_str='')
 
         # Only the first test's start should be printed.
         lines = err.buflist
         self.assertEqual(len(lines), 1)
         self.assertTrue(lines[0].endswith('passes/image.html\n'))