pytorch

2ccdc39d - Revert D21089648: Put TORCH_LIBRARY in torch/library.h; add custom class API

Revert D21089648: Put TORCH_LIBRARY in torch/library.h; add custom class API Test Plan: revert-hammer Differential Revision: D21089648 Original commit changeset: 8d54329c1252 fbshipit-source-id: 636e8a11afc628a4cdae9d44824985c10c70555e