pytorch

0721fc64 - Decouple MapDataPipe from Dataset (#70991)

Decouple MapDataPipe from Dataset (#70991) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/70991 Test Plan: Imported from OSS Reviewed By: dagitses Differential Revision: D33477680 Pulled By: ejguan fbshipit-source-id: d3e89492e921a96791319f35052a229684ddf7cf