S13nSW: Remove fetch-header-visibility.https.html from FlagExpectations

This test is failing regardless S13nServiceWorker is enabled or not.
We already have an entry in TestExpectation for this test so we can
remove the entry from FlagExpectations. I ran the test 100 times
(--iteration=10 and --repeat-each=10) and confirmed that the test
isn't flaky.

Bug: 715640
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I3ef85639001e2f01bc469ac771e479d816c3ea77
Reviewed-on: https://chromium-review.googlesource.com/1013675
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551276}
1 file changed