Remove deprecated tensor constructors in torch.distributions (#19979)
Summary:
This removes the deprecated `tensor.new_*` constructors (see #16770) from `torch.distributions` module.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19979
Differential Revision: D15195618
Pulled By: soumith
fbshipit-source-id: 46b519bfd32017265e90bd5c53f12cfe4a138021
