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

Tools/Scripts/webkitpy/tool/commands/rebaselineserver.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 32 matching lines @@
         self.layout_tests_directory = layout_tests_directory
         self.results_directory = results_directory
         self.platforms = platforms
         self.filesystem = filesystem
         self.scm = scm
 
 
 class RebaselineServer(AbstractLocalServerCommand):
     name = "rebaseline-server"
     help_text = __doc__
+    show_in_main_help = True
     argument_names = "/path/to/results/directory"
 
     server = RebaselineHTTPServer
 
     def _gather_baselines(self, results_json):
         # Rebaseline server and it's associated JavaScript expected the tests subtree to
         # be key-value pairs instead of hierarchical.
         # FIXME: make the rebaseline server use the hierarchical tree.
         new_tests_subtree = {}
 
@@ skipping 26 matching lines @@
         self._gather_baselines(results_json)
 
         return {
             'test_config': self._test_config,
             "results_json": results_json,
             "platforms_json": {
                 'platforms': platforms,
                 'defaultPlatform': port.name(),
             },
         }