RFR: 8353484: JFR: Simplify EventConfiguration

[Erik Gahlin]

Could I have a review of the change that removes code that is unnecessary now that the Security Manager is no longer used.



Testing: jdk/jdk/jfr

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/24371/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24371&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353484
  Stats: 72 lines in 4 files changed: 2 ins; 46 del; 24 mod
  Patch: https://git.openjdk.org/jdk/pull/24371.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24371/head:pull/24371

PR: https://git.openjdk.org/jdk/pull/24371