Eliminate unused PYAUTO tests and TestingAutomationProvider methods

chrome/test/functional/chromeos_offline.py

-#!/usr/bin/env python
-# Copyright (c) 2012 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 pyauto_functional
-import pyauto
-
-
-class TestOffline(pyauto.PyUITest):
-  """Tests the offline detection for ChromeOS."""
-
-  assert pyauto.PyUITest.IsChromeOS(), 'Works on ChromeOS only.'
-
-  def tearDown(self):
-    self.RestoreOnline()
-    pyauto.PyUITest.tearDown(self)
-
-  def testGoOffline(self):
-    """Tests the GoOffline pyauto method."""
-
-    self.GoOffline()
-    # Device takes a little bit of time to realize it's offline/online.
-    self.assertTrue(self.WaitUntil(
-                    lambda: self.NetworkScan().get('offline_mode')),
-                    msg='We are not offline.')
-
-
-if __name__ == '__main__':
-  pyauto_functional.Main()