Remove unused code from tool/main.py

Tools/Scripts/webkitpy/tool/main.py

 # Copyright (c) 2010 Google Inc. All rights reserved.
 # Copyright (c) 2009 Apple 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
@@ skipping 12 matching lines @@
 # 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.
 #
 # A tool for automating dealing with bugzilla, posting patches, committing patches, etc.
 
 from optparse import make_option
-import os
-import threading
 
 from webkitpy.common.host import Host
 from webkitpy.tool.multicommandtool import MultiCommandTool
 from webkitpy.tool import commands
 
 
 class WebKitPatch(MultiCommandTool, Host):
     global_options = [
         make_option("-v", "--verbose", action="store_true", dest="verbose", default=False, help="enable all logging"),
         make_option("-d", "--directory", action="append", dest="patch_directories", default=[], help="Directory to look at for changed files"),
     ]
 
     def __init__(self, path):
         MultiCommandTool.__init__(self)
         Host.__init__(self)
         self._path = path
-        self.wakeup_event = threading.Event()
 
     def path(self):
         return self._path
 
     def should_show_in_main_help(self, command):
         if not command.show_in_main_help:
             return False
         if command.requires_local_commits:
             return self.scm().supports_local_commits()
         return True
 
     # FIXME: This may be unnecessary since we pass global options to all commands during execute() as well.
     def handle_global_options(self, options):
         self.initialize_scm(options.patch_directories)
 
     def should_execute_command(self, command):
         if command.requires_local_commits and not self.scm().supports_local_commits():
             failure_reason = "%s requires local commits using %s in %s." % (command.name, self.scm().display_name(), self.scm().checkout_root)
             return (False, failure_reason)
         return (True, None)