RFR: 8323000: Parallel: Remove unused class declarations in psScavenge

[Albert Mingkun Yang]

On Thu, 4 Jan 2024 09:22:49 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code.

Thanks for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/17264#issuecomment-1876950826