RFR: 8345984: Remove redundant checkXXX methods from java.management Util class [v2]

[Kevin Walls]

> A post-SecurityManager removal cleanup task, to remove checkAccess(), checkMonitorAccess() and checkControlAccess() from src/java.management/share/classes/sun/management/Util.java (methods are already no-ops).
> 
> While here, there are a few imports of Util that are unnecessary.
> 
> No changes to the module visibility/exports.

Kevin Walls has updated the pull request incrementally with one additional commit since the last revision:

  (C)

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22680/files
  - new: https://git.openjdk.org/jdk/pull/22680/files/b27b6426..4b2872db

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22680&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22680&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22680.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22680/head:pull/22680

PR: https://git.openjdk.org/jdk/pull/22680