Remove a bunch of unused webkitpy code from tool/, common/checkout/ and common/config/

Tools/Scripts/webkitpy/common/checkout/checkout_mock.py

-# Copyright (C) 2011 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
-# in the documentation and/or other materials provided with the
-# distribution.
-#    * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-from webkitpy.common.system.filesystem_mock import MockFileSystem
-
-
-class MockCommitMessage(object):
-    def message(self):
-        return "This is a fake commit message that is at least 50 characters."
-
-
-class MockCheckout(object):
-    def __init__(self):
-        # FIXME: It's unclear if a MockCheckout is very useful.  A normal Checkout
-        # with a MockSCM/MockFileSystem/MockExecutive is probably better.
-        self._filesystem = MockFileSystem()
-
-    def is_path_to_changelog(self, path):
-        return self._filesystem.basename(path) == "ChangeLog"
-
-    def recent_commit_infos_for_files(self, paths):
-        return [self.commit_info_for_revision(32)]
-
-    def modified_changelogs(self, git_commit, changed_files=None):
-        # Ideally we'd return something more interesting here.  The problem is
-        # that LandDiff will try to actually read the patch from disk!
-        return []
-
-    def commit_message_for_this_commit(self, git_commit, changed_files=None):
-        return MockCommitMessage()
-
-    def apply_patch(self, patch):
-        pass
-
-    def apply_reverse_diffs(self, revision):
-        pass