This reverts commit bd9efe1f.

Reason for revert: clusterfuzz
Bug: chromium:1029174

Original change's description:
> [regexp] Stage match indices.
> 
> Bug: v8:9548
> Change-Id: Id6be43433b12733e39db712559715ba30e681059
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1935207
> Commit-Queue: Joshua Litt <joshualitt@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#65218}

TBR=adamk@chromium.org,jgruber@chromium.org,joshualitt@chromium.org

Change-Id: I098385e2dcebc7bfacd91312bcebfdb889b3d0ca
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9548
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1941137Reviewed-by: Joshua Litt <joshualitt@chromium.org>
Commit-Queue: Joshua Litt <joshualitt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65222}