ServiceWorker: Removed fixed entries from FlakyTests


BUG=392735
TEST=run_webkit_tests.py --debug http/tests/serviceworker
NOTRY=true

Review URL: https://codereview.chromium.org/390193006

git-svn-id: svn://svn.chromium.org/blink/trunk@178126 bbb929c8-8fbe-4397-9dbb-9b2b20218538