Deleting unused story sets

tools/perf/page_sets/top_10_mobile.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.
 from telemetry.page import cache_temperature as cache_temperature_module
 from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 from telemetry import story
 
 
 URL_LIST = [
@@ skipping 68 matching lines @@
         self.AddStory(Top10MobilePage(url, self, run_no_page_interactions,
           collect_memory_dumps, cache_temperature=temp))
 
 
 class Top10MobilePageSet(_Top10MobilePageSet):
   """ Top 10 mobile sites """
 
   def __init__(self, run_no_page_interactions=False, cache_temperatures=None):
     super(Top10MobilePageSet, self).__init__(run_no_page_interactions,
         cache_temperatures=cache_temperatures)
-
-
-class Top10MobileMemoryPageSet(_Top10MobilePageSet):
-  """ Top 10 mobile sites for measuring memory"""
-
-  def __init__(self):
-    super(Top10MobileMemoryPageSet, self).__init__(
-        run_no_page_interactions=False, collect_memory_dumps=True)
-