Removes print statements from test_torch.py (#15747)
Summary:
These print statements do not affect the test, and tests (generally) shouldn't print.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15747
Differential Revision: D13587289
Pulled By: soumith
fbshipit-source-id: c758793c9e35faf02bacba6c7c6d072f7c40453f
