pytorch

328ec546 - refactor the observer removal and quantize tensor

refactor the observer removal and quantize tensor Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/30360 Differential Revision: D18670373 Pulled By: lly-zero-one fbshipit-source-id: 1481d6e4d5ce40376577b8deb0a0f74d5559076e