[jdk21u] Integrated: 8315869: UseHeavyMonitors not used

[Aleksey Shipilev]

On Tue, 17 Oct 2023 09:44:28 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Unclean backport to clean up JDK 21 and make future backports more clean. The removed option is `develop`, so there is no compatibility problems.
> 
> The uncleanliness comes from the need to `-XX:+UnlockExperimentalVMOptions` the flag.
> 
> Additional testing:
>  - [x] `grep -R UseHeavyMonitors src/`, no hits
>  - [x] `grep -R UseHeavyMonitors test/`, no hits
>  - [x] macos-aarch64-server-fastdebug, affected tests pass
>  - [x] macos-aarch64-server-release, affected tests pass

This pull request has now been integrated.

Changeset: 2bef0bbb
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk21u/commit/2bef0bbb2002e5ba0e5fc502e8b9fb05d39e9a38
Stats:     16 lines in 4 files changed: 0 ins; 13 del; 3 mod

8315869: UseHeavyMonitors not used

Reviewed-by: phh
Backport-of: 3301fb1e8ad11d7de01a052e0a2d6178a7579ba6

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PR: https://git.openjdk.org/jdk21u/pull/265