diff --git a/vorlesung/L05_binaere_baeume/avl_tree.py b/vorlesung/L05_binaere_baeume/avl_tree.py
index 4a594bd..201655c 100644
--- a/vorlesung/L05_binaere_baeume/avl_tree.py
+++ b/vorlesung/L05_binaere_baeume/avl_tree.py
@@ -43,15 +43,6 @@ class AVLTree(BinaryTree):
         if parent:
             self.balance(parent)
 
-    def check_circle(self, node: AVLTreeNode, check_nodes = []):
-        if node is None:
-            return
-        if id(node) in check_nodes:
-            print("Circle detected")
-            return
-        self.check_circle(node.left, check_nodes + [id(node)])
-        self.check_circle(node.right, check_nodes + [id(node)])
-
 
 if __name__ == "__main__":