Revert D19905015: Revert D19858239: [pytorch][PR] Refactor and add VS 14.16 and 2019 CI for Windows
Test Plan: revert-hammer
Differential Revision:
D19905015
Original commit changeset: b117e44d5552
fbshipit-source-id: a10c78aed953434f69f466bdd36f914334ba82f3
