Revert "Implement `mul(dense, sparse), mul(sparse, dense)` for sparse COO tensors. (#81556)"
This reverts commit edd2f6daa70955906413179a86243456962e1a4d.
Reverted https://github.com/pytorch/pytorch/pull/81556 on behalf of https://github.com/kit1980 due to Broken internal test, S286911
