Remove old tests that have been migrated to the v8 repo.

R=adamk@chromium.org, machenbach@chromium.org
BUG=237872

Review URL: https://chromiumcodereview.appspot.com/20867002

git-svn-id: svn://svn.chromium.org/blink/trunk@155053 bbb929c8-8fbe-4397-9dbb-9b2b20218538