RFR: 8344120: Remove Security Manager dependencies from jdk.crypto.cryptoki module

[Sean Mullan]

Now that JEP 486 has been integrated, the `jdk.crypto.cryptoki` implementation dependencies on `System.getSecurityManager` and `AccessController.doPrivileged` can be removed.

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Commit messages:
 - Initial cleanup.

Changes: https://git.openjdk.org/jdk/pull/22077/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22077&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344120
  Stats: 193 lines in 6 files changed: 6 ins; 116 del; 71 mod
  Patch: https://git.openjdk.org/jdk/pull/22077.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22077/head:pull/22077

PR: https://git.openjdk.org/jdk/pull/22077