pytorch

d9960fbd - Revert D14446895: [C2] Implement rotated generate_proposals_op without opencv dependency (~2x faster)

Revert D14446895: [C2] Implement rotated generate_proposals_op without opencv dependency (~2x faster) Differential Revision: D14446895 Original commit changeset: 847f2443e645 fbshipit-source-id: fc6ab5ee59e027f125f5ab0f7ee51ad7db37d4a4