[jdk21u-dev] RFR: 8351665: Remove unused UseNUMA in os_aix.cpp

[Matthias Baesken]

8351665: Remove unused UseNUMA in os_aix.cpp

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Commit messages:
 - Backport 84f87dd4e96bbea42b482a3a23383c8894a40868

Changes: https://git.openjdk.org/jdk21u-dev/pull/1565/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1565&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351665
  Stats: 7 lines in 1 file changed: 0 ins; 7 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1565.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1565/head:pull/1565

PR: https://git.openjdk.org/jdk21u-dev/pull/1565