This method is dead now (after
https://chromium-review.googlesource.com/529844 and
https://chromium-review.googlesource.com/529210).

R=ahaas@chromium.org
BUG=v8:6474

Change-Id: Icd355283312bfae712c0db61bb5049925762060b
Reviewed-on: https://chromium-review.googlesource.com/530312Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45861}