Huggingface download stats incorrect due to change in download method

[ethanwhite]

The huggingface download stats are almost certainly too low (they currently show 13 downloads in the last month of the tree model. I suspect this is due to our change from a custom download system to the built-in .from_pretrained() combined with our attempts to track downloads.

We submitted code to model-libraries.ts that sets the tracking to occur when .pt and .pl files are downloaded:

• Current code
• Pull request
• Relevant docs

But from_pretained is downloading .safetensors and (I believe) config.json.

So, I suspect this will all 'just work' if we remove the custom code from model-libraries.ts. Alternatively we could change the extensions to .json and .safetensors, but it feels like the default implementation is best if it works.