spandrel python package pulls nvidia dependencies even on AMD systems, and since it's in requirements.txt it gets auto installed during updates

### Expected Behavior

Updating ComfyUI does not install nvidia dependencies on AMD systems

### Actual Behavior

Updating ComfyUI installs nvidia dependencies on AMD systems

### Steps to Reproduce

source venv/bin/activate
pip install -r requirements.txt

### Debug Logs

```powershell
Don't have them anymore and I don't want to install those deps again but out of other things:

nccl-cu12 nvidia-cuda-cupti-cu12 nvidia-cuda-nvrtc-cu12 nvidia-cuda-runtime-cu12 nvidia-cudnn-cu12 nvidia-cufft-cu12 nvidia-curand-cu12 nvidia-cusolver-cu12 nvidia-cusparse-cu12 nvidia-nccl-cu12 nvidia-nvjitlink-cu12 nvidia-nvtx-cu12

get installed
```

### Other

I suggest not putting spandrel as a default dependency until it doesn't pull nvidia deps on all platforms