Simplify classes ID attribute

Closes #192 (closed)

tests/test_elements_worker/test_elements.py

@@ -350,11 +350,9 @@ def test_load_corpus_classes(responses, mock_elements_worker):
         ),
     ]
     assert mock_elements_worker.classes == {
-        "11111111-1111-1111-1111-111111111111": {
-            "good": "0000",
-            "average": "1111",
-            "bad": "2222",
-        }
+        "good": "0000",
+        "average": "1111",
+        "bad": "2222",
     }