Revert "Enable aten-aten decomps (#85921)"
This reverts commit 62e4f51efdf98a3a91d29efa55e5665d5398b464.
Reverted https://github.com/pytorch/pytorch/pull/85921 on behalf of https://github.com/huydhn due to Sorry for reverting your PR. I think it breaks a dynamo test in trunk https://hud.pytorch.org/pytorch/pytorch/commit/62e4f51efdf98a3a91d29efa55e5665d5398b464
