Remove ‘How to pay’ section from pricing page

It’s on its own page now.

app/templates/admin_template.html

@@ -95,6 +95,7 @@
         <div class="column-one-quarter">
           <ul>
             <li><a href="{{ url_for("main.pricing") }}">Pricing</a></li>
+            <li><a href="{{ url_for("main.how_to_pay") }}">How to pay</a></li>
           </ul>
         </div>
         <div class="column-one-quarter">