Remove SecurityManager related code in the desktop module that is not covered by other PRs
------------- Commit messages: - 8345143 Changes: https://git.openjdk.org/jdk/pull/22424/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22424&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8345143 Stats: 275 lines in 32 files changed: 5 ins; 228 del; 42 mod Patch: https://git.openjdk.org/jdk/pull/22424.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22424/head:pull/22424 PR: https://git.openjdk.org/jdk/pull/22424
