pytorch

88c22070 - Revert D20768930: add quantized layer norm implementation

Revert D20768930: add quantized layer norm implementation Test Plan: revert-hammer Differential Revision: D20768930 Original commit changeset: ddf8727e9840 fbshipit-source-id: a190e1d1e42281eba627b0dbb6de1b3651cd5e97