Revert D33992798: Add TORCH_CUDA_CU_API to CUDABlas functions
Test Plan: revert-hammer
Differential Revision:
D33992798 (https://github.com/pytorch/pytorch/commit/07e9f86a4bb0116d61724a2b89866fe2f438ce0f)
Original commit changeset: baf08d7c704b
Original Phabricator Diff: D33992798 (https://github.com/pytorch/pytorch/commit/07e9f86a4bb0116d61724a2b89866fe2f438ce0f)
fbshipit-source-id: 86069d71bdd1c443c5b98b889ba79bf56875d452
(cherry picked from commit fae7cfbddf9f277754be03c76a6768f353104b44)
