pytorch

e67951af - Revert D20775782: Add temporary impl_UNBOXED syntax sugar for unboxed-only defs.

Revert D20775782: Add temporary impl_UNBOXED syntax sugar for unboxed-only defs. Test Plan: revert-hammer Differential Revision: D20775782 Original commit changeset: c5e804c69f59 fbshipit-source-id: 2198e715eb3a24d198a949a44ec192bec523ffb4