This is no longer necessary as the JSFunction::code field is now a
proper tagged field, that points to a Code object, instead of a
naked pointer into the beginning of the Code object. So now the
representation selection always sees a proper tagged value here.

Bug: v8:8015
Change-Id: Ia66e9425d82a0f765e4cbb6e3bed7bcdd9438958
Reviewed-on: https://chromium-review.googlesource.com/1196662Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55524}