Delete obsolete tests.

These tests never passed, were never enabled and I don't think we could make them reliable.
NOTRY=true
TBR=eustas
BUG=233124

Review URL: https://codereview.chromium.org/250953008

git-svn-id: svn://svn.chromium.org/blink/trunk@172775 bbb929c8-8fbe-4397-9dbb-9b2b20218538