quick cleanup

src/model/sense.py

@@ -22,13 +22,4 @@ class Sense(Editable):
     
     def merge_labels(self):
         return ", ".join(val for _, val in self.labels)
-    
-    def example_clusters(self):
-        result = set()
-        for ex in self.examples:
-            cluster = ex.get_cluster()
-            if cluster is not None:
-                result.add(cluster)
-                
-        return sorted(result, key=lambda x: x)