Switches test_jit to use float32 as its default scalar type (#36982)
Summary:
Our test suite used to set double as its default scalar type, and when it was switched to not do so (to be more consistent with how users experience PyTorch), a few tests had to still set the default scalar type to double to function properly. Now that the jit no longer creates double tensors so frequently, it appears that test_jit no longer needs to set double as its default scalar type, too.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36982
Differential Revision: D21152120
Pulled By: mruberry
fbshipit-source-id: ea6d3c1ad55552dc5affa1fe1bd0e5189849e6d7
