This reverts commit 2b140a9f.

Reason for revert: Need to revert parent CL.

Original change's description:
> [Temporal] Add Calendar.prototype.yearMonthFromFields
>
> Add AO: IsValidISOMonth, RegulateISOYearMonth, ISOYearMonthFromFields
> Spec Text:
> https://tc39.es/proposal-temporal/#sec-temporal-isvalidisomonth
> https://tc39.es/proposal-temporal/#sec-temporal-regulateisoyearmonth
> https://tc39.es/proposal-temporal/#sec-temporal-isoyearmonthfromfields
> https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.yearmonthfromfields
>
>
> Bug: v8:11544
> Change-Id: I1baadbbe54fb0c3fd45750eddb13b790465c3a3b
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3408773
> Commit-Queue: Frank Tang <ftang@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80384}

Bug: v8:11544
Change-Id: I1d93a25ee36b08d7a0bc86937d5b0a18ab6cdf86
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3632098
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80385}