Drop some unused variables (#70879)

Commit

3 years ago

Drop some unused variables (#70879) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/70879 Sandcastle from layer_norm_kernel.cu Test Plan: Sandcastle Reviewed By: malfet Differential Revision: D33439040 fbshipit-source-id: e7d0e37ab25d62c63f675da3b6eff670fd93b26a