Revert 3 commits due to an incomplete Rust roll.

Revert "rust: add more bisection scripts, documentation"

This reverts commit 9bbdd58cf3fd521e99ee3f0a2f9a509825dee158.

Revert "Generate and/or use PGO profiles in the Rust compiler."

This reverts commit 781355124c0a2e01a6f887329651264bf4763d5a.

Revert "dev-lang/{rust, rust-host}: upgrade to Rust 1.62.1"

This reverts commit 0135d5ceb3c2e13fe7a512e8db9a8287f8b45deb.

BUG=b:242236958,b:242227982,b:242256941
TEST=CQ

Change-Id: Ia964a71227b79639dbd647784a94fb850d699f47
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/3829868
Tested-by: George Burgess <gbiv@chromium.org>
Reviewed-by: George Burgess <gbiv@chromium.org>
Reviewed-by: Lizzy Presland <zland@google.com>
Auto-Submit: Michael Benfield <mbenfield@google.com>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
31 files changed