[jdk24] Withdrawn: 8345423: Shenandoah: Parallelize concurrent cleanup

[Xiaolong Peng]

On Wed, 8 Jan 2025 23:57:36 GMT, Xiaolong Peng <xpeng at openjdk.org> wrote:

> Clean backport, improve performance of concurrent cleanup of Shenandoah and GenShen, remove the use of heap lock from concurrent cleanup.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/22991