Revert "[Inductor] Add support for NEON ISA in the Inductor C++ backend (#105590)"
This reverts commit 156954d6a2a05f3ce8288dd054691102e596e461.
Reverted https://github.com/pytorch/pytorch/pull/105590 on behalf of https://github.com/ezyang due to https://github.com/pytorch/pytorch/issues/121288#issuecomment-1981980699 ([comment](https://github.com/pytorch/pytorch/pull/105590#issuecomment-1984745827))
