removing transformer from test

tests/test_import.py

@@ -7,10 +7,8 @@ def test_cellpose_imports_without_error():
 def test_model_zoo_imports_without_error():
     from cellpose import models, denoise
     for model_name in models.MODEL_NAMES:
-        if "neurips" not in model_name:
-            model = models.CellposeModel(model_type=model_name, 
-                      backbone="transformer" if "transformer" in model_name else "default")
-
+        if "neurips" not in model_name and "transformer" not in model_name:
+            model = models.CellposeModel(model_type=model_name)
 
 def test_gui_imports_without_error():
     from cellpose import gui