Eliminate the extra method, and update documentation to reflect the change.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - javadoc cleanup, test fix - 8383626: [lworld] Remove Objects.isValueObject method Changes: https://git.openjdk.org/valhalla/pull/2381/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2381&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8383626 Stats: 35 lines in 3 files changed: 8 ins; 14 del; 13 mod Patch: https://git.openjdk.org/valhalla/pull/2381.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2381/head:pull/2381 PR: https://git.openjdk.org/valhalla/pull/2381
