This reverts commit ef1e65d9.

Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20-%20debug/42329/overview

Original change's description:
> [maglev] Inline allocation for heap numbers
>
> Bug: v8:7700
> Change-Id: I2ce46fcfaab6716e6a31167ed517d2e8d9e433d8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3788094
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Commit-Queue: Victor Gomes <victorgomes@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82027}

Bug: v8:7700
Change-Id: I63ba2b1c879db652270fa1a83e32f6fec948333b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3791064
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#82034}