Integrated: 8365189: Remove LockingMode related code from arm32

[Fredrik Bredberg]

On Fri, 15 Aug 2025 09:29:04 GMT, Fredrik Bredberg <fbredberg at openjdk.org> wrote:

> Since the integration of [JDK-8359437](https://bugs.openjdk.org/browse/JDK-8359437) the `LockingMode` flag can no longer be set by the user, instead it's declared as `const int LockingMode = LM_LIGHTWEIGHT;`. This means that we can now safely remove all `LockingMode` related code from all platforms.
> 
> This PR removes `LockingMode` related code from the **arm32** platform.
> 
> When all the `LockingMode` code has been removed from all platforms, we can go on and remove it from shared (non-platform specific) files as well. And finally remove the `LockingMode` variable itself.

This pull request has now been integrated.

Changeset: 0b8ae260
Author:    Fredrik Bredberg <fbredberg at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/0b8ae260282dbb1fa1e8ce9d14f06f353327e03c
Stats:     356 lines in 6 files changed: 15 ins; 283 del; 58 mod

8365189: Remove LockingMode related code from arm32

Reviewed-by: aboldtch, coleenp

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PR: https://git.openjdk.org/jdk/pull/26795