[Telemetry] Remove results param in shared_state.TearDownState().

tools/telemetry/telemetry/story/shared_state.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.
 
 
 class SharedState(object):
   """A class that manages the test state across multiple user stories.
   It's styled on unittest.TestCase for handling test setup & teardown logic.
 
   """
@@ skipping 37 matching lines @@
     """
     raise NotImplementedError()
 
   def RunUserStory(self, results):
     """ Override to do any action before running each one of all user stories
     that share this same state.
     This method is styled on unittest.TestCase.run.
     """
     raise NotImplementedError()
 
-  def TearDownState(self, results):
+  def TearDownState(self):
     """ Override to do any action after running multiple user stories that
     share this same state.
     This method is styled on unittest.TestCase.tearDownClass.
     """
     raise NotImplementedError()