Revert "Symintified mmm/addmm derivative formulas (#85794)"
This reverts commit 230edd2515367fcb44cea7c40106ff9f6a712a2a.
Reverted https://github.com/pytorch/pytorch/pull/85794 on behalf of https://github.com/janeyx99 due to Sorry, reverting as this breaks an aot_autograd mac test on functorch https://hud.pytorch.org/pytorch/pytorch/commit/230edd2515367fcb44cea7c40106ff9f6a712a2a
