Remove deprecated TH(topk) code. #24778 (#24857)
Summary:
Remove deprecated TH(topk) code. https://github.com/pytorch/pytorch/issues/24778
Pull Request resolved: https://github.com/pytorch/pytorch/pull/24857
Differential Revision: D16916614
Pulled By: VitalyFedyunin
fbshipit-source-id: 00299fb85614b87f69b77d9672a4ace33d6cdfaa
