[Telemetry] Remove broken page from dummy_benchmark.noisy_benchmark_1

BUG=537676, 581465
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect

Review URL: https://codereview.chromium.org/1640323002

Cr-Commit-Position: refs/heads/master@{#371835}

tools/perf/benchmarks/dummy_benchmark.py

@@ -58,9 +58,3 @@ class DummyBenchmarkTwo(_DummyBenchmark):
   @classmethod
   def Name(cls):
     return 'dummy_benchmark.noisy_benchmark_1'
-
-  def CreateStorySet(self, options):
-    del options  # unused
-    story_set = dummy_story_set.DummyStorySet()
-    story_set.AddStory(dummy_story_set.BrokenDummyPage(story_set))
-    return story_set