remove obsolete test/test_datasets_transforms.py

[pmeier]

The deleted file tests if the transform and target_transform work properly for datasets.ImageFolder. With the dataset tests rework, we now automatically test transform, target_transform, and transforms for every dataset:

vision/test/datasets_utils.py

Lines 557 to 570 in 7b87af2

	@test_all_configs
	def test_transforms(self, config):
	mock = unittest.mock.Mock(wraps=lambda *args: args[0] if len(args) == 1 else args)
	for kwarg in self._TRANSFORM_KWARGS:
	if kwarg not in self._HAS_SPECIAL_KWARG:
	continue
	mock.reset_mock()
	with self.subTest(kwarg=kwarg):
	with self.create_dataset(config, **{kwarg: mock}) as (dataset, _):
	dataset[0]
	mock.assert_called()

[NicolasHug]

thanks @pmeier