Revert D24859919: [pytorch][PR] Grammatically updated the tech docs
Test Plan: revert-hammer
Differential Revision:
D24859919 (https://github.com/pytorch/pytorch/commit/a843d48ead119eb96a8dc7ed93202cf6f3558009)
Original commit changeset: 5c6a8bc8e785
fbshipit-source-id: f757995fb64cfd4212c978618d572367e7296758
