Remove unused code from tool/main.py

Tools/Scripts/webkitpy/tool/mocktool.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
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-import threading
-
 from webkitpy.common.host_mock import MockHost
 from webkitpy.common.net.buildbot.buildbot_mock import MockBuildBot
 
 # FIXME: Old-style "Ports" need to die and be replaced by modern layout_tests.port which needs to move to common.
 from webkitpy.common.config.ports_mock import MockPort
 
 
 # FIXME: We should just replace this with optparse.Values(default=kwargs)
 class MockOptions(object):
     """Mock implementation of optparse.Values."""
@@ skipping 16 matching lines @@
         return self.__dict__[key]
 
 
 # FIXME: This should be renamed MockWebKitPatch.
 class MockTool(MockHost):
     def __init__(self, *args, **kwargs):
         MockHost.__init__(self, *args, **kwargs)
 
         self._deprecated_port = MockPort()
 
-        self.wakeup_event = threading.Event()
-
     def deprecated_port(self):
         return self._deprecated_port
 
     def path(self):
         return "echo"
 
     def buildbot_for_builder_name(self, name):
         return MockBuildBot()