service worker: Remove unused resources/ files in http/tests/serviceworker

These were probably resources for tests that have been upstreamed to WPT
and removed.

Bug: 688116
Change-Id: Id9c08e2297b6c00c303f41734f9edeb9211c3749
Reviewed-on: https://chromium-review.googlesource.com/754243
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#514279}
21 files changed