This reverts commit 5442e8b2.

Reason for revert: https://crbug.com/v8/7006

Original change's description:
> Reland "Reuse arch/mode discovery in deopt fuzzer"
> 
> This is a reland of a24c7c9a
> Original change's description:
> > Reuse arch/mode discovery in deopt fuzzer
> > 
> > Bug: v8:6917
> > Change-Id: I1b7169c8702c8649812b17579d38d64de676ed60
> > Reviewed-on: https://chromium-review.googlesource.com/723420
> > Commit-Queue: Michał Majewski <majeski@google.com>
> > Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#48838}
> 
> Bug: v8:6917
> Change-Id: I03b2c288257d44c2df9d0fa6cf4750d1c5719d59
> Reviewed-on: https://chromium-review.googlesource.com/735719
> Commit-Queue: Michał Majewski <majeski@google.com>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48916}

TBR=machenbach@chromium.org,majeski@google.com

Change-Id: Ibbc16bb7115c8e8b93bd8f39065742d3c2d7739f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6917, v8:7006
Reviewed-on: https://chromium-review.googlesource.com/737807
Commit-Queue: Michał Majewski <majeski@google.com>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48960}