[Telemetry] Re-enable page_cycler.typical_25 on windows.

The underlying issue has been fixed.

BUG=273986
TBR=andrewhayden@chromium.org

Review URL: https://codereview.chromium.org/534313002

Cr-Commit-Position: refs/heads/master@{#293188}

tools/perf/benchmarks/page_cycler.py

@@ -105,9 +105,8 @@ class PageCyclerToughLayoutCases(benchmark.Benchmark):
   options = {'pageset_repeat': 10}
 
 
-# crbug.com/273986: This test is really flakey on xp.
 # cabug.com/341843: This test is always timing out on Android.
-@benchmark.Disabled('android', 'win')
+@benchmark.Disabled('android')
 class PageCyclerTypical25(benchmark.Benchmark):
   test = page_cycler.PageCycler
   page_set = page_sets.Typical25PageSet