For consistency, {Object} members should only be accessed via ".".
CL https://crrev.com/c/1624209 cleaned up the code base already. This
CL removes the now dead operator.

R=jkummerow@chromium.org

Bug: v8:9183, v8:3770
Change-Id: I599dcd49d79bfc68f970fe872b64b3b2680cddd5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1624788
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61768}