This is not needed as this is already a method on all ArrayBufferViews
and there is only one caller which actually uses the cast.

Bug: v8:9183
Change-Id: Ic45b40bf433c870bc8cb0121c24755fd03ce405b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622106
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Auto-Submit: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61688}