Unnecessary placeholder directory

Background

In the mesa-examples repo, there is a non-existent subproject, "rl_models" (https://github.com/projectmesa/mesa-examples/blob/main/rl/rl_models) that returns a 404 Error page when navigating to it in the GitHub UI.

The directory was added in c4b4c75.

It seems to be a placeholder for the pre-weighted models hosted at (https://huggingface.co/projectmesa/rl_models/), which can be cloned into the current directory and used in the examples.

Discussion

Because navigating to the folder results in a 404 error, it could cause confusion or decrease confidence in the Mesa examples for folks newly approaching the repo.

The only code relying on this directory to be present is rl/Tutorials.ipynb, which should be updated with instructions to perform the git clone of the actual rl_models repo prior to running the notebook.

Recommendation

Remove the folder and update rl/Tutorials.ipynb and rl/example.py comments to reflect the actual location of the repo.

Start by inspecting the placeholder reference in rl/Tutorials.ipynb and the related comments in rl/example.py, then compare them with the rl_models repository on Hugging Face. Done means removing the unnecessary placeholder directory and updating both files with the actual repository location and clone instructions.