RFR: 8345502: Remove doIntersectionPrivilege methods

[Sean Mullan]

The internal `ProtectionDomain.doIntersectionPrivilege` methods can be removed as all dependencies have been removed in post JEP 486 cleanup issues.

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Commit messages:
 - Initial cleanup.

Changes: https://git.openjdk.org/jdk/pull/22548/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22548&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345502
  Stats: 90 lines in 3 files changed: 0 ins; 90 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/22548.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22548/head:pull/22548

PR: https://git.openjdk.org/jdk/pull/22548