Remove unused imports in webkitpy with using autoflake.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/manager_unittest.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 # Copyright (C) 2010 Gabor Rapcsanyi (rgabor@inf.u-szeged.hu), University of Szeged
 #
 # 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 11 matching lines @@
 # 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.
 
 """Unit tests for manager.py."""
 
-import sys
 import time
 import unittest
 
 from webkitpy.common.host_mock import MockHost
 from webkitpy.layout_tests.controllers.manager import Manager
 from webkitpy.layout_tests.models import test_expectations
 from webkitpy.layout_tests.models.test_run_results import TestRunResults
 from webkitpy.tool.mocktool import MockOptions
 
 
@@ skipping 126 matching lines @@
             dir_name = '/tmp/layout-test-results' + '_' + str(x)
             self._make_fake_test_result(port.host, dir_name)
         manager = get_manager()
         manager._limit_archived_results_count()
         deleted_dir_count = 0
         for x in range(1, 31):
             dir_name = '/tmp/layout-test-results' + '_' + str(x)
             if not port.host.filesystem.exists(dir_name):
                 deleted_dir_count = deleted_dir_count + 1
         self.assertEqual(deleted_dir_count, 5)