RFR: 8341558: [AIX] build broken after 8341413

[Martin Doerr]

On Sat, 5 Oct 2024 09:55:42 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> The AIX build is currently broken due to a build warning caused by [JDK-8341413](https://bugs.openjdk.org/browse/JDK-8341413):
> osThread_aix.cpp:43:5: error: field '_last_cpu_times' will be initialized after field '_startThread_lock' [-Werror,-Wreorder-ctor]
> 
> It turns out that `_last_cpu_times` is unused and can be removed.

Thanks for the review! I couldn't find it, either. Let's just ship it to repair the build. It can easily get added back if needed.

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PR Comment: https://git.openjdk.org/jdk/pull/21369#issuecomment-2395151759