Revert D24924236: [pytorch][PR] [ONNX] Handle sequence output shape and type inference
Test Plan: revert-hammer
Differential Revision:
D24924236 (https://github.com/pytorch/pytorch/commit/adc65e7c8dce8380bb1e023bb29889efb3f51862)
Original commit changeset: 506e70a38cfe
fbshipit-source-id: 78069a33fb3df825af1cb482da06a07f7b26ab48
