This param is no longer used to construct the SFI.

Bug: v8:7503
Change-Id: Ic93c91ce0ad9acf84da7f382c9a170c732db7176
Reviewed-on: https://chromium-review.googlesource.com/977926Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52205}