Summary:
I'm setting up an automatic sync job for cppdocs and need two fixes to the cpp docs config:
1. Right now the cppdocs use the `torch` package to figure out the version. For C++ docs all I really need from the built package are the generated Tensor.h and Functions.h files. I can actually generate those directly via `aten/src/ATen/gen.py`, so I can skip building PyTorch altogether and save 10 minutes in the sync job! For this I need to avoid using the torch package in the docs.
2. Internal proxy issues prevent using the git link for sphinx_rtd_theme. We can just use the pip package for the cppdocs (not for the normal PyTorch docs)
soumith ezyang
Pull Request resolved: https://github.com/pytorch/pytorch/pull/11300
Differential Revision: D9667193
Pulled By: goldsborough
fbshipit-source-id: 5567e0b3d3bdce03f5856babdb4ff76bcee91846