Remove per-AppContext TimerQueue support. Just create one for the VM. A test that expressly checked per-AppContext TimerQueue behaviour is removed.
------------- Commit messages: - 8378605 Changes: https://git.openjdk.org/jdk/pull/29902/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29902&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8378605 Stats: 193 lines in 2 files changed: 1 ins; 185 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/29902.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/29902/head:pull/29902 PR: https://git.openjdk.org/jdk/pull/29902
