This reverts commit bc777d5fd6.
Reason for revert: WasmTyper needs adaptations.
Original change's description:
> [wasm-gc] Allow (ref none) to occur internally
>
> This type is uninhabited by any actual values, but it can show up
> as a "theoretical" value in the type system, e.g. for conditional
> branches that are statically never-taken.
>
> Bug: v8:7748
> Change-Id: Ieb8a5354dbd04fe76e1047766c5bb60f02f6cdd0
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4013859
> Commit-Queue: Matthias Liedtke <mliedtke@chromium.org>
> Reviewed-by: Matthias Liedtke <mliedtke@chromium.org>
> Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#84125}
Bug: v8:7748
Change-Id: Ic6fdd5deaabb2bac99dee25ccc65971b8de31e7c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4013688
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84132}
8c9426b381