Embedding thrust->cub: unique (#63042)
Summary:
Followup of https://github.com/pytorch/pytorch/pull/62495
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63042
Reviewed By: saketh-are
Differential Revision: D30231084
Pulled By: ngimel
fbshipit-source-id: 03b0a88107e8a2aee3570881d81bf2b676f525cd
