Gardening. Remove crash expectation for some web-animations-css/transitions tests.

These were fixed while the change to add them to the virtual suite was landing.

NOTRY=true
TBR=steveblock

Review URL: https://codereview.chromium.org/39873002

git-svn-id: svn://svn.chromium.org/blink/trunk@160437 bbb929c8-8fbe-4397-9dbb-9b2b20218538