Remove empty file tests/unit/command/test_commit.py (#5316)
Remove empty file tests/unit/command/test_commit.py (#5316)

When I opened it, I got confused for a second and had to double-check if it was really empty.
The empty file gives a false assurance. We do need to add one, which I'll add later, but for now,
we better remove it.
efiop/dvc,dmpetrov/dataversioncontrol,efiop/dvc,dmpetrov/dataversioncontrol