Remove devel banner

Author: Jaime Melis

source/_templates/layout.html

@@ -4,14 +4,3 @@
     {{ super() }}
     <a class='btn btn-neutral' id="start-here" href="{{ pathto('intro_release_notes/concepts_terminology/intro') }}"><i class="fa fa-font-awesome" aria-hidden="true"></i>&nbsp;Start Here</a>
 {% endblock %}
-
-{% block devel %}
-    <div class="admonition warning alert alert-danger alert-error" style="margin-left: 15px; margin-right: 15px;">
-        <p class="first admonition-title">
-            Warning
-        </p>
-        <p class="last">
-            This guide is under development. The material on this page needs to be reviewed for completeness and accuracy. This guide may have not been updated yet from the last release.
-        </p>
-    </div>
-{% endblock %}