Fix gcl_unittest: shutil is not imported by gcl.py.

Review URL: http://codereview.chromium.org/2627010

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@49049 0039d316-1c4b-4281-b951-d872f2087c98

tests/gcl_unittest.py

@@ -50,7 +50,7 @@ class GclUnittest(GclTestsBase):
         'SendToRietveld', 'TryChange', 'UnknownFiles', 'Warn',
         'attrs', 'breakpad', 'defer_attributes', 'gclient_utils', 'getpass',
         'main', 'need_change', 'need_change_and_args', 'no_args', 'os',
-        'random', 're', 'shutil', 'string', 'subprocess', 'sys', 'tempfile',
+        'random', 're', 'string', 'subprocess', 'sys', 'tempfile',
         'time', 'upload', 'urllib2',
     ]
     # If this test fails, you should add the relevant test.