pytorch

e3470ae4 - Revert D15003379: Have _embedding_bag_dense_backward match JIT signature.

Revert D15003379: Have _embedding_bag_dense_backward match JIT signature. Differential Revision: D15003379 Original commit changeset: f8e82800171f fbshipit-source-id: 55f83557998d166aeb41d00d7a590acdc76fcf22