Remove redundant SecurityManager, AccessController references (following on from JDK-8338411: Implement JEP 486: Permanently Disable the Security Manager).
------------- Commit messages: - imports - unwrap, exception handling - ReflectUtil removal - tweak - 8344394: Remove SecurityManager and related calls from java.management.rmi Changes: https://git.openjdk.org/jdk/pull/22270/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22270&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8344394 Stats: 290 lines in 3 files changed: 52 ins; 198 del; 40 mod Patch: https://git.openjdk.org/jdk/pull/22270.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22270/head:pull/22270 PR: https://git.openjdk.org/jdk/pull/22270
