[webkitpy] Remove leftover changelog editor methods from User.

Tools/Scripts/webkitpy/common/system/user_unittest.py

 # Copyright (C) 2010 Research in Motion Ltd. 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 108 matching lines @@
         for test_case in test_cases:
             expected, inputs = test_case
 
             def mock_raw_input(message):
                 self.assertEqual(expected[0], message)
                 return inputs[1]
 
             result = User().confirm(default=inputs[0],
                                     raw_input=mock_raw_input)
             self.assertEqual(expected[1], result)
-
-    def test_warn_if_application_is_xcode(self):
-        output = OutputCapture()
-        user = User()
-        output.assert_outputs(self, user._warn_if_application_is_xcode, ["TextMate"])
-        output.assert_outputs(self, user._warn_if_application_is_xcode, ["/Applications/TextMate.app"])
-        output.assert_outputs(self, user._warn_if_application_is_xcode, ["XCode"])  # case sensitive matching
-
-        xcode_warning = "Instead of using Xcode.app, consider using EDITOR=\"xed --wait\".\n"
-        output.assert_outputs(self, user._warn_if_application_is_xcode, ["Xcode"], expected_stdout=xcode_warning)
-        output.assert_outputs(self, user._warn_if_application_is_xcode, ["/Developer/Applications/Xcode.app"], expected_stdout=xcode_warning)