Revert D31732419: [JIT] Add partial evaluation graph stitching logic
Test Plan: revert-hammer
Differential Revision:
D31732419 (https://github.com/pytorch/pytorch/commit/5db7db667f34bb46db3533d1b2aaae72d1a7e50d)
Original commit changeset: 883a55cbeef0
fbshipit-source-id: f5faba69dfb6b54aeb29d1beaeec8c5b0373830f
