Revert "Upgrade submodule sleef to fix build warning (#122168)"
This reverts commit eec8b252b70b2489aee7281d336eb9c32dd85483.
Reverted https://github.com/pytorch/pytorch/pull/122168 on behalf of https://github.com/zou3519 due to trying to revert another PR ([comment](https://github.com/pytorch/pytorch/pull/122168#issuecomment-2009653474))
