Revert "[Dynamo] Support torch.{cuda/cpu}.amp.autocast (#95416)"
This reverts commit c88aa336aa0734f42b4d9db7f624d6cfd9b5065e.
Reverted https://github.com/pytorch/pytorch/pull/95416 on behalf of https://github.com/huydhn due to Sorry for reverting your PR. But it seems that the smoke test issue is related as it starts to fail consistently in trunk https://hud.pytorch.org/hud/pytorch/pytorch/master/1?per_page=50&name_filter=inductor_torchbench_smoketest_perf
