remove the button

animations/trees/level_order/index.html

@@ -10,7 +10,6 @@
 <h1>Binary Tree: Level Order Traversal</h1>
 <p>This animation shows how to traverse a binary tree by levels. Click the "next step" button to run the animation.</p>
 
-<label>level order traversal</label> <input type="text" id="textIn"><button onclick="start()">Start</button>
 <br>
 <button onclick="nextstep()">next step</button>