Remove reference to registered_metamodels for now

wrappers/modelverse.py

@@ -922,8 +922,7 @@ def element_list_nice(model_name):
     """Fetches a nice representation of models."""
     _goto_mode(MODE_MODELLING)
 
-    global registered_metamodels
-    _input(["element_list_nice", model_name, registered_metamodels[model_name]])
+    _input(["element_list_nice", model_name])
 
     return json.loads(_handle_output("Success: ", split=" "))