RFR: 8344147: Remove Security Manager dependencies from java.security.sasl module

[Sean Mullan]

Now that JEP 486 has been integrated, java.security.sasl implementation dependencies on AccessController.doPrivileged can be removed.

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Commit messages:
 - Initial cleanup.

Changes: https://git.openjdk.org/jdk/pull/22087/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22087&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344147
  Stats: 37 lines in 2 files changed: 0 ins; 15 del; 22 mod
  Patch: https://git.openjdk.org/jdk/pull/22087.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22087/head:pull/22087

PR: https://git.openjdk.org/jdk/pull/22087