Deprecate torch.hub._download_url_to_file

[zhanwenchen]

🐛 Bug

To Reproduce

Steps to reproduce the behavior:

1. 1. 1.

Expected behavior

Environment

Please copy and paste the output from the environment collection script from PyTorch (or fill out the checklist below manually).

You can get the script and run it with:

wget https://raw.githubusercontent.com/pytorch/pytorch/master/torch/utils/collect_env.py
# For security purposes, please check the contents of collect_env.py before running it.
python collect_env.py

• PyTorch Version (e.g., 1.0):
• OS (e.g., Linux):
• How you installed PyTorch (conda, pip, source):
• Build command you used (if compiling from source):
• Python version:
• CUDA/cuDNN version:
• GPU models and configuration:
• Any other relevant information:

Additional context