Remove passing testharness expected files that are not required.

This is removing ~250 files that are not required because they are
passing testharness output in an expected file. Adding such file will be
prevented via a PRESUBMIT check, see https://codereview.chromium.org/332583002/

BUG=None

Review URL: https://codereview.chromium.org/328243002

git-svn-id: svn://svn.chromium.org/blink/trunk@176164 bbb929c8-8fbe-4397-9dbb-9b2b20218538