clear skipping tests (#1285)

* clear skipping tests

* fix simple/multi GPU

* review: simplify

tests/models/test_cpu.py

@@ -206,12 +206,10 @@ def test_disabled_validation():
     assert model.validation_end_invoked, 'did not run `validation_end` with `fast_dev_run=True`'
 
 
+@pytest.mark.skipif(not torch.cuda.is_available(), reason="test requires GPU machine")
 def test_single_gpu_batch_parse():
     tutils.reset_seed()
 
-    if not tutils.can_run_gpu_test():
-        return
-
     trainer = Trainer()
 
     # batch is just a tensor