Revert D23858329: [PT Model Split] Support 2 operators in PT by C2 conversion
Test Plan: revert-hammer
Differential Revision:
D23858329 (https://github.com/pytorch/pytorch/commit/721cfbf8425cf2c1dc5e27d1332e32e1a42ef541)
Original commit changeset: ed37118ca7f0
fbshipit-source-id: 30c700f80665be11afc608b00a77766064e60b35
