Revert of [Telemetry] Introduce shared_user_story_state for real.

tools/telemetry/telemetry/user_story/__init__.py

Index: tools/telemetry/telemetry/user_story/__init__.py
diff --git a/tools/telemetry/telemetry/user_story/__init__.py b/tools/telemetry/telemetry/user_story/__init__.py
index 3b6620ed98487b39e627d2d0315e2040b352aba8..43592d8600cb2ffbc52000092d6f90eaad43de57 100644
--- a/tools/telemetry/telemetry/user_story/__init__.py
+++ b/tools/telemetry/telemetry/user_story/__init__.py
@@ -3,32 +3,12 @@
 # found in the LICENSE file.
 
 import re
-from telemetry.user_story import shared_user_story_state
 
 _next_user_story_id = 0
 
 
 class UserStory(object):
-  """A class styled on unittest.TestCase for creating user story tests.
-
-  Test should override Run to maybe start the application and perform actions
-  onto it. To share state between different tests, one can define a
-  shared_user_story_state which contains hooks that will be called before &
-  after mutiple user stories run and in between runs.
-
-  Args:
-    shared_user_story_state_class: subclass of
-      telemetry.user_story.shared_user_story_state.SharedUserStoryState.
-    name: string name of this user story that can be used for identifying user
-      story in results output.
-    labels: A list or set of string labels that are used for filtering. See
-      user_story.user_story_filter for more information.
-  """
-
-  def __init__(self, shared_user_story_state_class, name='', labels=None):
-    assert issubclass(shared_user_story_state_class,
-                      shared_user_story_state.SharedUserStoryState)
-    self._shared_user_story_state_class = shared_user_story_state_class
+  def __init__(self, name='', labels=None):
     self._name = name
     global _next_user_story_id
     self._id = _next_user_story_id
@@ -44,10 +24,6 @@
   @property
   def labels(self):
     return self._labels
-
-  @property
-  def shared_user_story_state_class(self):
-    return self._shared_user_story_state_class
 
   @property
   def id(self):