sdk/test: Add explanation to empty tutorial test

Author: JAB1305

sdk/test/examples/test_tutorials.py

@@ -45,6 +45,7 @@ def test_tutorial_storage(self):
     )
     def test_tutorial_backend_couchdb(self):
         pass
+        # The tutorial already includes assert statements for the relevant points. So no further checks are required.
 
     def test_tutorial_serialization_deserialization_json(self):
         with temporary_workingdirectory():