Cleanup tracer handling of optional arguments (#43009)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43009
* **#43009 Cleanup tracer handling of optional arguments**
Test Plan: Imported from OSS
Reviewed By: ngimel
Differential Revision: D23766621
Pulled By: mruberry
fbshipit-source-id: c1b46cd23b58b18ef4c03021b2514d7e692badb6
