Revert of Four new pages added to tough_scheduling_cases

tools/perf/page_sets/tough_scheduling_cases.py

Index: tools/perf/page_sets/tough_scheduling_cases.py
diff --git a/tools/perf/page_sets/tough_scheduling_cases.py b/tools/perf/page_sets/tough_scheduling_cases.py
index f3b5cff37d5ae67cbaed6d77be4159bd5aa88291..2cc7ca6f4dff4c7624feb3987dacd72f50bd5efc 100644
--- a/tools/perf/page_sets/tough_scheduling_cases.py
+++ b/tools/perf/page_sets/tough_scheduling_cases.py
@@ -331,6 +331,7 @@
       self.synthetic_delays = {
         'blink.HandleInputEvent': {'target_duration': 0.2}
       }
+
     self.bounce = bounce
 
   def RunSmoothness(self, action_runner):
@@ -370,8 +371,7 @@
   """ Tough scheduler latency test cases """
 
   def __init__(self):
-    super(ToughSchedulingCasesPageSet, self).__init__(
-        archive_data_file='data/tough_scheduling_cases.json')
+    super(ToughSchedulingCasesPageSet, self).__init__()
 
     # Why: Simple scrolling baseline
     self.AddPage(ToughSchedulingCasesPage(
@@ -465,14 +465,3 @@
       page_set=self))
     # Why: For measuring the latency of scroll-synchronized effects.
     self.AddPage(SynchronizedScrollOffsetPage(page_set=self))
-
-    real_pages_url_list = [
-          'http://www.latimes.com',
-          ('http://io9.com/the-10-most-shocking-characters-that-george-r-r-' +
-           'martin-1579481155/+tinaamini'),
-          'http://ftw.usatoday.com/2014/05/spelling-bee-rules-shenanigans',
-          'http://m.espn.go.com/nhl/rankings'
-    ]
-
-    for url in real_pages_url_list:
-      self.AddPage(ToughSchedulingCasesPage(url, self))