Remove unused Python variables in torch/[_-a]* (#133492)
Summary:
X-link: https://github.com/pytorch/pytorch/pull/133492
Approved by: https://github.com/albanD
Reviewed By: clee2000
Differential Revision: D67153461
fbshipit-source-id: 2182ae5048821fd2670dc42e056ebb833986b869
