pytorch

27ad34a7 - Revert D17558701: [refactor] move more functions to InsertObserversHelper

Revert D17558701: [refactor] move more functions to InsertObserversHelper Test Plan: revert-hammer Differential Revision: D17558701 Original commit changeset: 96ef87db74bd fbshipit-source-id: fc398d3b8bb1cd0bae573e3fdac5cfb883b31373