Remove some tests that are duplicated by w3c tests
(namely those in https://github.com/w3c/web-platform-tests/tree/master/web-animations/interfaces/AnimationEffectTiming).

BUG=623437

Review-Url: https://codereview.chromium.org/2142593003
Cr-Commit-Position: refs/heads/master@{#405077}
2 files changed