pytorch

715e951e - Revert D18458751: use new overload mechanism for rnns

Revert D18458751: use new overload mechanism for rnns Test Plan: revert-hammer Differential Revision: D18458751 Original commit changeset: 07c71838f21c fbshipit-source-id: 86acb02f3e022e93ea6c1ef23fe39c80ad43978f