Remove zero_dim_tensors only from _th_index_fill_. (#28512)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28512
This just ensures that (since we only have a Scalar implementation), if you pass in a Tensor that's not zero-dim you get a nice error message.
Instead, of doing this with codegen, we do this in code at the ATen level.
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D18086965
Pulled By: gchanan
fbshipit-source-id: f3853bbbb0cf5816803a00877a2e94aa89e32c3b
