Removed typographical error from tech docs (#51286)
Summary:
Dublications removed from tech docs.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51286
Reviewed By: albanD
Differential Revision: D26227627
Pulled By: ailzhang
fbshipit-source-id: efa0cd90face458673b8530388378d5a7eb0f1cf
