Revert "Enable thp(transparent huge pages) for buffer sizes >=2MB (#93888)"
This reverts commit 2cc845eb1a45c7ea494c33262a97f9a348818261.
Reverted https://github.com/pytorch/pytorch/pull/93888 on behalf of https://github.com/seemethere due to Reverting due to internal build issues, Meta employees see: https://fburl.com/sandcastle/1p4zvldk