Revert "torch.compiler public namespace (#102182)"
This reverts commit b5840f99c3f2ae01b7831fd32b99758180fc22c3.
Reverted https://github.com/pytorch/pytorch/pull/102182 on behalf of https://github.com/DanilBaibak due to Break internal build ([comment](https://github.com/pytorch/pytorch/pull/102182#issuecomment-1576144551))
