How can l uninstall PyTorch with Anaconda?
I installed PyTorch with:
conda install pytorch torchvision cuda80 -c soumith

How do I uninstall and remove all PyTorch dependencies?

From the anaconda docs, you can uninstall with conda uninstall

Try

conda uninstall pytorch torchvision cuda80 -c soumith


Alternatively, the pytorch docs suggest 

conda uninstall pytorch
pip uninstall torch
pip uninstall torch # run this command twice

