ICU-TC will deprecate NoUnit later and we were advised to
replace the code from using it.

Bug: v8:10377
Change-Id: I8d76624c5378daab1cdabae52917566d0a4dd687
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2132717Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66969}