RFR: JDK-8328776: [AIX] remove checked_vmgetinfo, use vmgetinfo directly

Fri Mar 22 08:24:31 UTC 2024

The subroutine vmgetinfo
https://www.ibm.com/docs/es/aix/7.2?topic=v-vmgetinfo-subroutine
https://www.ibm.com/docs/es/aix/7.1?topic=v-vmgetinfo-subroutine
was not available on very old OS releases; but we do not support / run on those old releases anyway these days so the helper checked_vmgetinfo can be removed.

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Commit messages:
 - JDK-8328776

Changes: https://git.openjdk.org/jdk/pull/18446/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18446&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328776
  Stats: 17 lines in 1 file changed: 1 ins; 14 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18446.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18446/head:pull/18446

PR: https://git.openjdk.org/jdk/pull/18446