Revert D24068202: [pytorch][PR] Add typing return value to init in nn.Module
Test Plan: revert-hammer
Differential Revision:
D24068202 (https://github.com/pytorch/pytorch/commit/506397a809a1442ba777a63308144b7539cbcd69)
Original commit changeset: 4cd9b6ca12b5
fbshipit-source-id: f45fcf7ee6ee9198ed6f3f34956ce68a64378c32
