Revert "Add meta and OpInfo for _embedding_bag_dense_backward (#109211)"
This reverts commit fe14e43d14420a53426215a5fff30113da6d216a.
Reverted https://github.com/pytorch/pytorch/pull/109211 on behalf of https://github.com/clee2000 due to Sorry I think the test_ops.py::TestCommonCUDA::test_compare_cpu__embedding_bag_dense_backward_cuda_float32 is failing https://hud.pytorch.org/pytorch/pytorch/commit/492a93d185a74bb4ccb9dea184a71f43f8952083 https://github.com/pytorch/pytorch/actions/runs/6190707847/job/16808644559 not sure why this is run in slow when it looks to be a new test ([comment](https://github.com/pytorch/pytorch/pull/109211#issuecomment-1720235918))
