Revert D35679120: Add first version of Buck build workflow
Test Plan: revert-hammer
Differential Revision:
D35679120 (https://github.com/pytorch/pytorch/commit/c132b9fd71eaa4adf7b43c1309e7627075db18b8)
Original commit changeset: 5544227c2734
Original Phabricator Diff: D35679120 (https://github.com/pytorch/pytorch/commit/c132b9fd71eaa4adf7b43c1309e7627075db18b8)
fbshipit-source-id: c47eff7e1b5124dd7d82a6d927d1030fba22d5da
(cherry picked from commit cd52bda782d1b22a2a27a3221757f5d3a6c4a2ad)
