Remove CUDA 9.2 and older references from our cmake (#65065)
Summary:
Removes old CUDA references in our cuda.cmake
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65065
Reviewed By: malfet
Differential Revision: D30992673
Pulled By: janeyx99
fbshipit-source-id: 85b524089ed57e5acbc71720267cf05e24a8c20a
