Revert D24711613: [pytorch][PR] Preserve submodule with __set_state__ in freezing
Test Plan: revert-hammer
Differential Revision:
D24711613 (https://github.com/pytorch/pytorch/commit/a3e1bd1fb9ad1dbc8506068d206969ca08872404)
Original commit changeset: 22e51417454a
fbshipit-source-id: c2090b15fdba2d6c9dc1fbd987d32229dd898608
