Revert "Make autoroll account owner of auto-updated files"

This reverts commit 09249d12.

Reason for revert: closes the tree with "gclient runhooks" on https://cr-buildbucket.appspot.com/build/8839654272213578577 V8 Presubmit from 09249d12

Original change's description:
> Make autoroll account owner of auto-updated files
>
> Bug: v8:12049
> Change-Id: Iff1d09a17c3e0bbcd7b62baae7766d3745d0b084
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3071212


> Reviewed-by: Adam Klein <adamk@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Liviu Rau <liviurau@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#76129}

Bug: v8:12049
Change-Id: Id21c3ef4ea99b29f3c458508da8e27ce0d687d65
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3077148


Reviewed-by: Liviu Rau <liviurau@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Liviu Rau <liviurau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76130}