RFR: 8349375: Cleanup AIX special file build settings

[Martin Doerr]

On Thu, 6 Feb 2025 08:58:17 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> The special optimization settings for  jvmtiEnterTrace.cpp on AIX can be removed ; the file compiles now some seconds with or without this workaround.
> The special settings were needed for ancient versions of xlC.

LGTM.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23487#pullrequestreview-2598474809