The objects are already in fast mode so they were NOOP.

The commit that obsoleted them was
https://chromium-review.googlesource.com/c/v8/v8/+/571750/

Bug: v8:10479,v8:5902

Change-Id: Ic3611f899d3138cda5bcff6debe529118ced5c93
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2172746
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67534}