[Refactoring] Fix imports order for torch/utils/data/dataset.py (#61328)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/61328
Test Plan: Imported from OSS
Reviewed By: ejguan
Differential Revision: D29588897
Pulled By: VitalyFedyunin
fbshipit-source-id: 63df653fb471532819c83ebcee4f9dc951500ffb
