pytorch

27308642 - Fix unused variable warning in layer_norm_kernel.cu (#71587)

Fix unused variable warning in layer_norm_kernel.cu (#71587) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/71587 Test Plan: Sandcastle Reviewed By: meyering Differential Revision: D33692615 fbshipit-source-id: 84d249eb967fb97191aaf59c9a96cac9f8cae498 (cherry picked from commit ca36d04c3166dbeac73ef88ecc215c0b426169dc)