This reverts commit 23cb219f.

Reason for revert: https://crbug.com/v8/7996

Original change's description:
> [build] Add MB config for deprecation warning bot
> 
> TBR=yangguo@chromium.org
> NOTRY=true
> 
> Bug: v8:7963
> Change-Id: I1a91047b2a3c7d128f3b01a0970ce53a63c196d6
> Reviewed-on: https://chromium-review.googlesource.com/1145187
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54585}

TBR=machenbach@chromium.org,yangguo@chromium.org
NOTRY=true

Bug: v8:7996
Change-Id: Ib6a0c972cd9bdf864295f70ebeda50f9f23ca314
Reviewed-on: https://chromium-review.googlesource.com/1156404
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54807}