[pyfi] override TP2 networkx -> PyFI networkx (#37764)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37764
Auto-generated diff for TP2->PyFI migration.
```
networkx
TP2 version: 2.0
PyFI active wheels (networkx):
py2-darwin -> 2.3
py2-platform007 -> 2.2
py3-darwin -> 2.3
py3-platform007 -> 2.3
py3.7-platform007 -> 2.3
```
#buildmore
excited_python
Test Plan: buildallthethings
Reviewed By: thatch
Differential Revision: D19790867
fbshipit-source-id: d6f893beee794df5408a5117978b534cafc6ec83
