Remove transitive dependency 'ply' from requirements.txt

[vtalos]

As part of our ongoing research on Python dependency management we noticed a potential improvement in your project’s dependency management.

Specifically, the transitive dependency ply, which is required by stone, is specified as a requirement in the requirements.txt file, even though it is not used directly and does not need to be listed explicitly, as it will be automatically handled by pip during installation.

This PR removes it from requirements.txt to let pip manage it automatically, which helps keeping the dependency list clean.

Hope this is helpful!

Checklist

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• Non-code related change (markdown/git settings etc)
• SDK Code Change
• Example/Test Code Change

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• Do the tests pass?

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[alyx-db]

Hi @vtalos,

Thanks for your submission. I'll pass this along to the team. I can't promise if or when that might be implemented though.