Revert "[dynamo] Improve support for backwards hooks (#119525)"
This reverts commit b1f4b2a63c038f0090886d7d213825f39c283ea5.
Reverted https://github.com/pytorch/pytorch/pull/119525 on behalf of https://github.com/clee2000 due to broke test_autograd.py::TestAutograd::test_post_accumulate_grad_hook_gets_cleaned_up on dynamo https://github.com/pytorch/pytorch/actions/runs/7847212828/job/21416215820 https://hud.pytorch.org/pytorch/pytorch/commit/b1f4b2a63c038f0090886d7d213825f39c283ea5. The failure exists on the PR as well, but got masked by the other test. Putting this as no signal? ([comment](https://github.com/pytorch/pytorch/pull/119525#issuecomment-1936447169))
