This reverts commit 1efe6259.

Reason for revert: Broken V8 Linux - arm - sim - lite build - https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux%20-%20arm%20-%20sim%20-%20lite/1259

Original change's description:
> [snapshot] Clear irregexp code prior to serialization
> 
> Compiled irregexp code should be cleared unless
> FunctionCodeHandling::kKeep is passed.
> 
> Bug: v8:8572
> Change-Id: Icb74cc6e0f39a69f8383b05f1638cf0e3be1807c
> Reviewed-on: https://chromium-review.googlesource.com/c/1373773
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#58272}

TBR=yangguo@chromium.org,jgruber@chromium.org

Change-Id: I7a8c7f5c1500714bccee5c11224fbdf0132c6d78
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8572
Reviewed-on: https://chromium-review.googlesource.com/c/1379874Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58273}