pytorch

5c4bd9a3 - Move python-independent c10d implementations to torch/lib (#47309)

Move python-independent c10d implementations to torch/lib (#47309) Summary: * This is a pre-step to build c10d into libtorch * Includes a minor cleanup in c10d/CMakeLists.txt Pull Request resolved: https://github.com/pytorch/pytorch/pull/47309 Reviewed By: wanchaol Differential Revision: D24711768 Pulled By: gmagogsfm fbshipit-source-id: 6f9e0a6a73c30f5ac7dafde9082efcc4b725dde1