Fix pylint unused-* warnings in webkitpy/tool.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/flakytests_unittest.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import flakytests
 
-from webkitpy.common.checkout.scm.scm_mock import MockSCM
+from webkitpy.layout_tests.builder_list import BuilderList
 from webkitpy.layout_tests.layout_package import bot_test_expectations
-from webkitpy.layout_tests.builder_list import BuilderList
 from webkitpy.tool.commands.commandtest import CommandsTest
 from webkitpy.tool.mocktool import MockTool, MockOptions
 
 
 class FakeBotTestExpectations(object):
 
-    def expectation_lines(self, only_ignore_very_flaky=False):
+    def expectation_lines(self):
         return []
 
 
 class FakeBotTestExpectationsFactory(object):
     FAILURE_MAP = {"A": "AUDIO", "C": "CRASH", "F": "TEXT", "I": "IMAGE", "O": "MISSING",
                    "N": "NO DATA", "P": "PASS", "T": "TIMEOUT", "Y": "NOTRUN", "X": "SKIP",
                    "Z": "IMAGE+TEXT", "K": "LEAK"}
 
     def __init__(self, builders):
         self.builders = builders
@@ skipping 48 matching lines @@
         tool = MockTool()
         tool.builders = self.fake_builders_list()
         command.expectations_factory = FakeBotTestExpectationsFactory
         options = MockOptions(upload=True)
         expected_stdout = flakytests.FlakyTests.OUTPUT % (
             flakytests.FlakyTests.HEADER,
             '',
             flakytests.FlakyTests.FLAKINESS_DASHBOARD_URL % '') + '\n'
 
         self.assert_execute_outputs(command, options=options, tool=tool, expected_stdout=expected_stdout)