RFR: 8359207: Remove runtime/signal/TestSigusr2.java since it is always skipped

[David Holmes]

On Mon, 16 Jun 2025 21:33:38 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

> I wonder if `SIGUSR2` was only useful on Solaris.

IIRC only testable on Solaris because there we had a special dedicated signal for suspend/resume. On all the *X platforms SIGUSR2 is used as SR_signum, and so can't be tested by this test.

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PR Comment: https://git.openjdk.org/jdk/pull/25825#issuecomment-2979071810