RFR: 8349571: Remove JavaThreadFactory interface from SA

[Kevin Walls]

On Thu, 6 Feb 2025 23:22:25 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

> The SA JavaThreadFactory interface is no longer used, so it is being removed. I stumbled on it while looking at JavaThread related code. It looks like it's original purpose is related to JavaThread subclasses at one point being platform dependent, as described in the following JavaThread.java comment:
> 
> 
> /** This is an abstract class because there are certain OS- and
>     CPU-specific operations (like the setting and getting of the last
>     Java frame pointer) which need to be factored out. These
>     operations are implemented by, for example,
>     SolarisSPARCJavaThread, and the concrete subclasses are
>     instantiated by the JavaThreadFactory in the Threads class. */
> 
> 
> However, this is no longer the case, and this comment is being removed as part of [JDK-8348347](https://bugs.openjdk.org/browse/JDK-8348347).

Looks good, I see no other references.

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Marked as reviewed by kevinw (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23505#pullrequestreview-2601518642