Remove header from cheatsheet

cms/templates/widgets/open-ended-edit.html

@@ -36,17 +36,6 @@
     <article class="simple-editor-cheatsheet">
         <div class="cheatsheet-wrapper">
             <div class="row">
-                <h6>Heading 1</h6>
-                <div class="col sample heading-1">
-                    <img src="/static/img/header-example.png" />
-                </div>
-                <div class="col">
-<pre><code>H1
-    =====
-</pre>
-                </div>
-            </div>
-            <div class="row">
                 <h6>Prompt</h6>
                 <div class="col prompt">
                 </div>