Remove passing testharness expected files that are not required.

Hopefully, those are the last files to remove before CL 332583002 lands
and prevent any further addition.

BUG=None

Review URL: https://codereview.chromium.org/528313002

git-svn-id: svn://svn.chromium.org/blink/trunk@181316 bbb929c8-8fbe-4397-9dbb-9b2b20218538