Fix lint errors introduced in pytorch/pytorch@ceece5d (#16454)
Summary:
ifedan
```
./test/common_utils.py:748:1: E302 expected 2 blank lines, found 1
./test/test_torch.py:1235:5: E303 too many blank lines (2)
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16454
Differential Revision: D13844905
Pulled By: bddppq
fbshipit-source-id: 3dc7c740d86310a8efc9864d7c7798fda8257a21
