[DataPipe] Remove duplicate dataset (#54553)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/54553
Test Plan: Imported from OSS
Reviewed By: VitalyFedyunin
Differential Revision: D27279301
Pulled By: ejguan
fbshipit-source-id: 112a83e7061e3f35dc517eb623bd9ca93c2f034c
