Revert D22552377: [pytorch][PR] Reland split unsafe version
Test Plan: revert-hammer
Differential Revision:
D22552377 (https://github.com/pytorch/pytorch/commit/5bba973afd81b8df5c4dd85fa6f2ec38e3549f04)
Original commit changeset: 1d1b713d2429
fbshipit-source-id: 8194458f99bfd5f077b7daa46ca3e81b549adc1b
