RFR: 8364110: Remove unused methods in GCCause

[Albert Mingkun Yang]

On Fri, 25 Jul 2025 09:48:50 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing dead code.

Thanks for review.

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PR Comment: https://git.openjdk.org/jdk/pull/26476#issuecomment-3118282537