pytorch

ff5f38f5 - Revert D19858239: [pytorch][PR] Refactor and add VS 14.16 and 2019 CI for Windows

Revert D19858239: [pytorch][PR] Refactor and add VS 14.16 and 2019 CI for Windows Test Plan: revert-hammer Differential Revision: D19858239 Original commit changeset: f068d8505886 fbshipit-source-id: b117e44d5552e157747920d8098ce3b86a29c6bf