[packaging] simpler dependency plotting (#45686)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45686
This uses an online graphviz viewer. The code is simpler, and
since it embeds all the data in the url you can just click the url
from your terminal.
Test Plan: Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D24059157
Pulled By: zdevito
fbshipit-source-id: 94d755cc2986c4226180b09ba36f8d040dda47cc
