<i18n dev> RFR: 8345143: Remove uses of SecurityManager in the java.desktop module

[Phil Race]

Remove SecurityManager related code in the desktop module that is not covered by other PRs

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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