diff --git a/src/main/cljs/clojure/data/avl.cljs b/src/main/cljs/clojure/data/avl.cljs
index d4c97d5..04143e7 100644
--- a/src/main/cljs/clojure/data/avl.cljs
+++ b/src/main/cljs/clojure/data/avl.cljs
@@ -86,10 +86,6 @@
                  (.getHeight node)
                  (.getRank node)))))
 
-(defn ^:private height [node]
-  (if (nil? node)
-    0
-    (.getHeight node)))
 
 (defn ^:private rotate-left [node]
   (let [l    (.getLeft  node)