pytorch

b4b8b3c0 - Revert D20630988: [quant][graph] Add a new observer type for dynamic quantization

Revert D20630988: [quant][graph] Add a new observer type for dynamic quantization Test Plan: revert-hammer Differential Revision: D20630988 Original commit changeset: 7e7aca77590f fbshipit-source-id: 6bc67ca322c1703004e0053f8eba9b8f6a3a5f67