Remove unused test case in run_webkit_tests_unittest.

Change-Id: I5f27a3208aa76435c126ce7b1f041d5739fd64d6
Reviewed-on: https://chromium-review.googlesource.com/530037
Commit-Queue: Quinten Yearsley <qyearsley@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478811}

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/run_webkit_tests_unittest.py

@@ -1259,18 +1259,6 @@ class RebaselineTest(unittest.TestCase, StreamTestingMixin):
             expected_extensions=['.png'], )
 
 
-class PortTest(unittest.TestCase):
-
-    # TODO(qyearsley): Remove or re-enable this test.
-
-    def assert_mock_port_works(self, port_name):
-        self.assertTrue(passing_run(['--platform', 'mock-' + port_name,
-                                     'fast/harness/results.html'], tests_included=True, host=Host()))
-
-    def disabled_test_mac_lion(self):
-        self.assert_mock_port_works('mac-lion')
-
-
 class MainTest(unittest.TestCase):
 
     def test_exception_handling(self):