pytorch

12bace14 - Revert D13970381: [caffe2] Add visibility to registry class to fix ubsan error

Revert D13970381: [caffe2] Add visibility to registry class to fix ubsan error Differential Revision: D13970381 Original commit changeset: 763db24b8a98 fbshipit-source-id: dda8672ed0bc6fecc4dde5ce73feb99e15205978