Revert D33767740: [pytorch][PR] Sparse CSR CPU: cuSolverSP backend for `linalg.solve`
Test Plan: revert-hammer
Differential Revision:
D33767740 (https://github.com/pytorch/pytorch/commit/199d9a992c0062de7bd7fe0a9f3414a3c1f08a74)
Original commit changeset: a945f065210c
Original Phabricator Diff: D33767740 (https://github.com/pytorch/pytorch/commit/199d9a992c0062de7bd7fe0a9f3414a3c1f08a74)
fbshipit-source-id: b7934df18118f8d6d5f165deb5aae9887953ae43
(cherry picked from commit d3ddbb021b227e3638f6f7c22c6eadfa73695e31)
