RFR: 8305936: JavaThread::create_system_thread_object has unused is_visible argument

[David Holmes]

On Thu, 13 Apr 2023 08:48:20 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Please review this simple cleanup of an unused parameter in  `create_system_thread_object`. Details are in JBS.
>> 
>> Testing: tiers 1-3
>> 
>> Thanks.
>
> Looks good.

Thanks for the review @kimbarrett!

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PR Comment: https://git.openjdk.org/jdk/pull/13455#issuecomment-1506740659