Multiple service worker tests are failing together and are flaky.

[Matt Lewis]

imported/w3c/web-platform-tests/service-workers/service-worker/fetch-request-redirect.https.html
imported/w3c/web-platform-tests/service-workers/service-worker/interfaces-sw.https.html
imported/w3c/web-platform-tests/service-workers/service-worker/redirected-response.https.html

are all failing together and are flaky according to the flakiness dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fservice-workers%2Fservice-worker%2Ffetch-request-redirect.https.html
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fservice-workers%2Fservice-worker%2Finterfaces-sw.https.html
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fservice-workers%2Fservice-worker%2Fredirected-response.https.html

build:

https://build.webkit.org/results/Apple%20Sierra%20Release%20WK2%20(Tests)/r227068%20(6973)/results.html
https://build.webkit.org/builders/Apple%20Sierra%20Release%20WK2%20(Tests)/builds/6973

It looks like they are all failing with the same issue of a harness error causing a timeout.

[Radar WebKit Bug Importer]

<rdar://problem/36605122>

[Matt Lewis]

Marked these as flaky on macOS WK2 in:

https://trac.webkit.org/changeset/227148/webkit

[youenn fablet]

This does no longer seem to be the case.
Closing.