This reverts commit 007c0034.

Reason for revert: fails on TSAN bots (e.g., https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux64%20TSAN/23395)

Original change's description:
> [Intl] Handle 'c' pattern for DateTimeFormat
> 
> Handle the pattern 'c' return by ICU in Intl.DateTimeFormat
> for weekday standalone form.
> Add regression test to ensure all the standalone pattern return
> option are in the expected list.
> 
> Bug: v8:8413
> Change-Id: I9ab42383e3882ef1720606830624775e2748fccb
> Reviewed-on: https://chromium-review.googlesource.com/c/1318092
> Reviewed-by: Jungshik Shin <jshin@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Commit-Queue: Frank Tang <ftang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#57299}

TBR=jshin@chromium.org,gsathya@chromium.org,ftang@chromium.org

Change-Id: Iff0afbcd4527428e16b779d84dc7b8b70eb1fe16
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8413
Reviewed-on: https://chromium-review.googlesource.com/c/1320891Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57301}