pytorch

c27cabe2 - Revert D15719982: Collapse tracing_state.h into tracer.h

Revert D15719982: Collapse tracing_state.h into tracer.h Differential Revision: D15719982 Original commit changeset: 56bb021dd949 fbshipit-source-id: 2eb3e2c9745c35a84ebcc0fc7ac62b5f1fdd6437