Remove unused class OutputCaptureTestCaseBase.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/outputcapture.py

 # Copyright (c) 2009, 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
@@ skipping 83 matching lines @@
             testassert = testcase.assertMultiLineEqual
         else:
             testassert = testcase.assertEqual
 
         testassert(stdout_string, expected_stdout)
         testassert(stderr_string, expected_stderr)
         if expected_logs is not None:
             testassert(logs_string, expected_logs)
         # This is a little strange, but I don't know where else to return this information.
         return return_value
-
-
-class OutputCaptureTestCaseBase(unittest.TestCase):
-    maxDiff = None
-
-    def setUp(self):
-        unittest.TestCase.setUp(self)
-        self.output_capture = OutputCapture()
-        (self.__captured_stdout, self.__captured_stderr) = self.output_capture.capture_output()
-
-    def tearDown(self):
-        del self.__captured_stdout
-        del self.__captured_stderr
-        self.output_capture.restore_output()
-        unittest.TestCase.tearDown(self)
-
-    def assertStdout(self, expected_stdout):
-        self.assertEqual(expected_stdout, self.__captured_stdout.getvalue())
-
-    def assertStderr(self, expected_stderr):
-        self.assertEqual(expected_stderr, self.__captured_stderr.getvalue())