RFR: 8327729: Remove deprecated xxxObject methods from jdk.internal.misc.Unsafe

[Martin Buchholz]

On Sun, 10 Mar 2024 05:50:33 GMT, Eirik Bjørsnøs <eirbjo at openjdk.org> wrote:

> Please review this PR which removes the 19 deprecated `xxObject*` alias methods from `jdk.internal.misc.Unsafe`.
> 
> These methods were added in JDK-8213043 (JDK 12), presumably to allow `jsr166.jar` to be used across JDK versions. This was a follow-up fix after JDK-8207146 had renamed these methods to `xxReference*'.
> 
> Since OpenJDK is now the single source of truth for `java.util.concurrent`, time has come to remove these deprecated alias methods.
> 
> This change was initially discussed here: https://mail.openjdk.org/pipermail/core-libs-dev/2024-March/119993.html
> 
> Testing: This is a pure deletion of deprecated methods, so the PR includes no test changes and the `noreg-cleanup` label is added in the JBS. I have verified that all `test/jdk/java/util/concurrent/*` tests pass.
> 
> Tagging @DougLea and @Martin-Buchholz to verify that this removal is timely.

Thanks for the tidying - I agree the time is right.

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Marked as reviewed by martin (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18176#pullrequestreview-1926388276