Remove AppContext from Swing's synth related classes. 2 tests that check this code uses AppContext are removed.
------------- Commit messages: - 8376232 Changes: https://git.openjdk.org/jdk/pull/29394/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29394&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8376232 Stats: 313 lines in 8 files changed: 6 ins; 283 del; 24 mod Patch: https://git.openjdk.org/jdk/pull/29394.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/29394/head:pull/29394 PR: https://git.openjdk.org/jdk/pull/29394
