Remove free-threaded tests and trove classifier

[cclauss]

-        "Programming Language :: Python :: Free Threading",

This undoes a mistake made at:

• Add Python 3.14, 3.14t, and PyPy-3.11 to the testing #35 (comment)

because there are thread-unsafe tests as demonstrated in:

• Test Python thread safety with pytest-run-parallel #42

[Copilot]

Pull Request Overview

This PR removes the "Programming Language :: Python :: Free Threading" classifier from the project's setup configuration. This appears to be a cleanup change to remove a potentially invalid or unsupported PyPI trove classifier.

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[mkmkme]

Yeah, thanks. I was thinking about removing it myself.
Could you remove it from the CI as well for now? I can see the testing with free-threading Python requires some hacks at this moment that effectively remove the benefits of free threading completely. Proper support for free threading requires more effort, so we will address it later.

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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