Revert D27902824: static runtime support for fb::equally_split
Test Plan: revert-hammer
Differential Revision:
D27902824 (https://github.com/pytorch/pytorch/commit/a4e47ea152d9942f85e5c8718ba206da95b53f9e)
Original commit changeset: 7855047c3bd4
fbshipit-source-id: a46834418ce98826871cd604d1a01f0ff8f23d7f
