Remove AppContext from the X11 XWindow implementation class. Also removed a remaining import in XToolkit.
A test that uses AppContext started to fail on Linux. It looks like it still proves something useful even without an AppContext, so I did some minimal updating to remove AppContext and clean it up, and it passes. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8384215 Changes: https://git.openjdk.org/jdk/pull/31104/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31104&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8384215 Stats: 52 lines in 3 files changed: 20 ins; 6 del; 26 mod Patch: https://git.openjdk.org/jdk/pull/31104.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31104/head:pull/31104 PR: https://git.openjdk.org/jdk/pull/31104
