Revert "Limit loop unrolling (#120023)"
This reverts commit 6cc7f9a2e6bedff3109ea066278e9805713da4bb.
Reverted https://github.com/pytorch/pytorch/pull/120023 on behalf of https://github.com/anijain2305 due to breaks llms export ([comment](https://github.com/pytorch/pytorch/pull/120023#issuecomment-1974104633))
