RFR: 8370326: Parallel: Remove unused ParCompactionManager::push

[Albert Mingkun Yang]

On Tue, 21 Oct 2025 11:40:49 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code.
> 
> Test: tier1

Thanks for review.

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PR Comment: https://git.openjdk.org/jdk/pull/27914#issuecomment-3426747541