--- a/testing/gtest/rungtests.py
+++ b/testing/gtest/rungtests.py
@@ -1,19 +1,18 @@
 #!/usr/bin/env python
 #
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 from __future__ import with_statement
-import sys, os, tempfile, shutil
+import sys, os
 from optparse import OptionParser
 import mozprocess, mozinfo, mozlog, mozcrash
-from contextlib import contextmanager
 
 log = mozlog.getLogger('gtest')
 
 class GTests(object):
     # Time (seconds) to wait for test process to complete
     TEST_PROC_TIMEOUT = 1200
     # Time (seconds) in which process will be killed if it produces no output.
     TEST_PROC_NO_OUTPUT_TIMEOUT = 300