RFR: 8346304: SA doesn't need a copy of getModifierFlags.

[Coleen Phillimore]

Please review this trivial change to remove unused SA code.  Ran serviceability/sa tests, tier1 testing in progress.

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Commit messages:
 - 8346304: SA doesn't need a copy of getModifierFlags.

Changes: https://git.openjdk.org/jdk/pull/22772/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22772&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346304
  Stats: 78 lines in 5 files changed: 0 ins; 76 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/22772.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22772/head:pull/22772

PR: https://git.openjdk.org/jdk/pull/22772