RFR: 8359924: Deprecate and obsolete ParallelRefProcEnabled

[Thomas Schatzl]

On Wed, 18 Jun 2025 21:26:56 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> > Same with `ReferencesPerThread`, again separately, but that does not need a CSR.
> 
> We could remove ReferencesPerThread immediately, without first deprecating, since it's experimental.

I would keep it as diagnostic option just in case, but removing this is also an option.

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PR Comment: https://git.openjdk.org/jdk/pull/25875#issuecomment-2995361450