Revert of Add loading mobile story set

tools/perf/benchmarks/loading.py

-# Copyright 2016 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 core import perf_benchmark
-import page_sets
-
-from benchmarks import page_cycler_v2
-from telemetry import benchmark
-from telemetry.page import cache_temperature
-
-
-@benchmark.Enabled('android')
-class LoadingMobile(perf_benchmark.PerfBenchmark):
-  """ A benchmark measuring loading performance of mobile sites. """
-
-  options = {'pageset_repeat': 2}
-
-  def CreateTimelineBasedMeasurementOptions(self):
-    return page_cycler_v2.TimelineBasedMeasurementOptionsForLoadingMetric()
-
-  @classmethod
-  def Name(cls):
-    return 'loading.mobile'
-
-  def CreateStorySet(self, options):
-    return page_sets.LoadingMobileStorySet(cache_temperatures=[
-          cache_temperature.ANY])