RFR: 8344177: Remove SecurityManager and related calls from java.management [v2]

[Kevin Walls]

> Remove redundant SecurityManager, AccessController references
> (following on from JDK-8338411: Implement JEP 486: Permanently Disable the Security Manager).

Kevin Walls has updated the pull request incrementally with two additional commits since the last revision:

 - remove missed suppression
 - comment correction

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/22100/files
  - new: https://git.openjdk.org/jdk/pull/22100/files/6ea63d5c..f8062515

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22100&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22100&range=00-01

  Stats: 4 lines in 2 files changed: 0 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/22100.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22100/head:pull/22100

PR: https://git.openjdk.org/jdk/pull/22100