This reverts commit 3b1d24cf.

Reason for revert: The problem is fixed

Original change's description:
> Revert "[Intl] Use new getDefaultHourCycle to replace old hack"
> 
> This reverts commit 611e4127.
> 
> Reason for revert: https://crbug.com/1080367
> 
> Original change's description:
> > [Intl] Use new getDefaultHourCycle to replace old hack
> > 
> > Use the ICU 67.1 new API DateTimePatternGenerator::getDefaultHourCycle
> > to replace a hack which get the pattern of "jjmm" to find out the
> > default hour cycle of a locale
> > Bump the required API version from 65 to 67
> > 
> > Bug: v8:10225
> > Change-Id: I3378edacb6dfb8400357ac0bf3d5d50b9fe008bd
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2173875
> > Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> > Commit-Queue: Frank Tang <ftang@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#67549}
> 
> TBR=jkummerow@chromium.org,ftang@chromium.org
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Bug: v8:10225
> Change-Id: I8bdfbdfc6c906814e5a7525cbde79c9cac854bd1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2208811
> Reviewed-by: Zhi An Ng <zhin@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67929}

TBR=jkummerow@chromium.org,zhin@chromium.org,ftang@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:10225
Change-Id: I386cf0347a0fa5403fb196bb46ac77f48c9c0a0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2229470Reviewed-by: Frank Tang <ftang@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68165}