Revert "Introduce discontinuity to nested tensor (#80981)"
This reverts commit b492f7c485d27e7b3949e5b75349a1d56ff0b968.
Reverted https://github.com/pytorch/pytorch/pull/80981 on behalf of https://github.com/osalpekar due to This was reverted internally in D38142790, due to causing TorchScript inference failures
