Revert "Added support for Huber Loss (#37599)" (#43351)
Summary:
This reverts commit 11e5174926d807a540fc7b54fb45a26ec0c5d9c0 due to [comment](https://github.com/pytorch/pytorch/pull/37599#pullrequestreview-471950192).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43351
Reviewed By: pbelevich, seemethere
Differential Revision: D23249511
Pulled By: vincentqb
fbshipit-source-id: 18b8b346f00eaf0ef7376b06579d404a84add4de
