Remove unused file cmake/Modules/FindMIOpen.cmake (#22244)
Summary:
`cmake/public/LoadHIP.cmake` calls `find_package(miopen)`, which uses the CMake module in MIOpen installation (It includes the line `set(miopen_DIR ${MIOPEN_PATH}/lib/cmake/miopen)`). `cmake/Modules/FindMIOpen.cmake` is not used.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22244
Differential Revision: D16000771
Pulled By: bddppq
fbshipit-source-id: 07bb40fdf033521e8427fc351715d47e6e30ed34
