`Reference.waitForReferenceProcessing` is in internal API, which should go away with [JDK-8344332](https://bugs.openjdk.org/browse/JDK-8344332). There is single use of that internal API in the tests, the last use of which was removed by [JDK-8080225](https://bugs.openjdk.org/browse/JDK-8080225). We can remove the `Reference.waitForReferenceProcessing` break-ins in the tests now.
Additional testing: - [x] Affected test still passes ------------- Commit messages: - Fix Changes: https://git.openjdk.org/jdk/pull/23239/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23239&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8348301 Stats: 26 lines in 1 file changed: 0 ins; 26 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/23239.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23239/head:pull/23239 PR: https://git.openjdk.org/jdk/pull/23239
