[PyTorch] validate that SparseTensorImpl::dim needn't be overridden (#49767)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49767
I'm told that the base implementation should work fine. Let's validate that in an intermediate diff before removing it.
ghstack-source-id: 119528066
Test Plan: CI
Reviewed By: ezyang, bhosmer
Differential Revision: D25686830
fbshipit-source-id: f931394d3de6df7f6c5c68fe8ab711d90d3b12fd
