Revert "Enable thp(transparent huge pages) for buffer sizes >=2MB (#95963)"
This reverts commit 3bb16a084298ed8b9a1e59622afd80418ff4a2f1.
Reverted https://github.com/pytorch/pytorch/pull/95963 on behalf of https://github.com/izaitsevfb due to Breaks internal android builds: unused function c10_compute_alignment [-Werror,-Wunused-function]
