GitLab

Summary:
The unit test failures seems to be caused by [conda 4.11](https://github.com/conda/conda/issues/11096)
Remove conda update line fixes the issue.

Pull Request resolved: https://github.com/pytorch/audio/pull/2069

Reviewed By: carolineechen

Differential Revision: D33023851

Pulled By: nateanl

fbshipit-source-id: 73246189d4ccc541e366a5367f532a5b456af8f8