Since AppContext is obsolete, we can bypass it and directly post the shutdown event, and remove the now dead code.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8384209 Changes: https://git.openjdk.org/jdk/pull/31101/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31101&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8384209 Stats: 42 lines in 2 files changed: 1 ins; 38 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/31101.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31101/head:pull/31101 PR: https://git.openjdk.org/jdk/pull/31101
