Revert D27803529: [pytorch][PR] .github: Add initial linux CI workflow
Test Plan: revert-hammer
Differential Revision:
D27803529 (https://github.com/pytorch/pytorch/commit/7d410bc3c8131c29083117a145b13a8bc1d87260)
Original commit changeset: 52a65ec8f7a8
fbshipit-source-id: ce968654f2aecd8b36b5f86e0fe5ed6056f0fb8a
