The --js-arguments flag is gone since https://crrev.com/c/1291469.
This CL removes a remaining reference to that, and as a drive-by
changes the proposed '--noflag' to '--no-flag'.

R=petermarshall@chromium.org

Bug: v8:8834
Change-Id: I69a8d008e87949d64329b4350197ba0651b54340
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1558087Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60720}