Fixed render test

integration/test_mvc.py

@@ -370,6 +370,4 @@ class TestModelverseCore(unittest.TestCase):
 
         transformation_add_MT({"abstract": "CausalBlockDiagrams", "rendered": "MM_rendered_graphical"}, {"abstract": "CausalBlockDiagrams", "rendered": "MM_rendered_graphical"}, "render_graphical_CBD", open("models/CBD_mapper.mvc", 'r').read(), add_tracability)
         result = model_render("my_CBD", "render_graphical_CBD")
-        import json
-        result = json.loads(result)
         assert len(result) == 23