Revert "Merge and improve torch optim optimizer type stubs (#102593)"
This reverts commit 3279f06410032e9798e380cedf552f5b706ac6c1.
Reverted https://github.com/pytorch/pytorch/pull/102593 on behalf of https://github.com/malfet due to There is nothing wrong with this PR, but it fails some internal builds that depend on outdated typing_extensions, will reland when update is done ([comment](https://github.com/pytorch/pytorch/pull/102593#issuecomment-1636062515))
