chore: Drop pytest-asyncio

[booxter]

No description provided.

[JamesKunstle]

Why do we need the asyncio stuff in this lib anyway? I've been wondering if we can just drop that requirement altogether

[booxter]

We can definitely drop it at least until we feel the need. I will drop.

[mergify]

This pull request has merge conflicts that must be resolved before it can be
merged. @booxter please rebase it. https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[RobotSail]

@JamesKunstle We use async logic in order to optimize I/O logic and optimize the amount of CPU time available so the training loop doesn't hang on blocking FS write calls. You can see this in action if you look at the AsyncStructuredLogger implementation here: https://github.com/instructlab/training/blob/main/src/instructlab/training/async_logger.py

[RobotSail]

We can remove this now, but I have a feeling we will need to just bring it back in again later.

[JamesKunstle]

We can re-add this when we have tests that need it. For now it's tidier to just remove it.