This is the second attempt at removing this.
Earlier (https://chromium-review.googlesource.com/579194) there were
regressions on some of the functions related to maps and sets. Now that
all of them are ported to CSA, we can remove the remaining uses of
SetForceInlineFlag.

Bug: v8:6682
Change-Id: Iebf296038aa24b65181b0d10531b0569d313e7fc
Reviewed-on: https://chromium-review.googlesource.com/647452Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47856}