CMake: Clean up unused definitions (#69216)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69216
This cleans up 4 pre-processor defines not used by any code:
- HAVE_GCC_GET_CPUID
- USE_GCC_GET_CPUID
- USE_AVX
- USE_AVX2
`cpuid` isn't used in PyTorch any more, we only use `cpuinfo`.
`USE_AVX*` is also not used, instead `HAVE_*_CPU_DEFINITIONS` tells
you which `CPU_CAPABILITY` flags are being compiled.
There is also `fbgemm`'s code path adding `third_party` as an include
path, despite `fbgemm` having a dedicated include directory and a
CMake setup that properly includes it.
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D33794424
Pulled By: malfet
fbshipit-source-id: 99d504af088818d4a26c2f6ce67ec0d59a5eb703
(cherry picked from commit 2e099d41f0e2f7d96c6013ac83223a75f4e4f862)
