Remove several unneeded modules from webkitpy.common.

Tools/Scripts/webkitpy/common/thread/threadedmessagequeue.py

Index: Tools/Scripts/webkitpy/common/thread/threadedmessagequeue.py
diff --git a/Tools/Scripts/webkitpy/common/thread/threadedmessagequeue.py b/Tools/Scripts/webkitpy/common/thread/threadedmessagequeue.py
deleted file mode 100644
index e43476764209e4a7332d61ebbd4fc191e483f858..0000000000000000000000000000000000000000
--- a/Tools/Scripts/webkitpy/common/thread/threadedmessagequeue.py
+++ /dev/null
@@ -1,52 +0,0 @@
-# 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
-# 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.
-
-import threading
-
-
-class ThreadedMessageQueue(object):
-    def __init__(self):
-        self._messages = []
-        self._is_running = True
-        self._lock = threading.Lock()
-
-    def post(self, message):
-        with self._lock:
-            self._messages.append(message)
-
-    def stop(self):
-        with self._lock:
-            self._is_running = False
-
-    def take_all(self):
-        with self._lock:
-            messages = self._messages
-            is_running = self._is_running
-            self._messages = []
-        return (messages, is_running)
-