S13nSW: Remove external/wpt/service-workers/service-worker/ready.https.html from FlagExpectations

It sometimes crashed before but it seems it's no longer flaky. I ran
the tests under external/wpt/service-workers/service-worker 10 times each
but I couldn't observe crashes (with dcheck_always_on = true).

$ run-webkit-tests --release --iterations=10 --additional-driver-flag=--enable-features=NetworkService external/wpt/service-workers/service-worker/

Bug: 715640
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I019c942b6caf98223205b9b66cea0ba926838a4e
Reviewed-on: https://chromium-review.googlesource.com/1002792
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549160}
1 file changed