Revert "Add torch.float8_e5m2 and torch.float8_e4m3 data types (#104242)"
This reverts commit a9804130e5a9a982d82934fa9702abd08d6903ce.
Reverted https://github.com/pytorch/pytorch/pull/104242 on behalf of https://github.com/PaliC due to breaks lint (run lintrunner and remerge) ([comment](https://github.com/pytorch/pytorch/pull/104242#issuecomment-1644150284))
