Remove December Banner (#828)

* Initial plan

* Comment out banner include to hide December banner

Co-authored-by: ckenst <6896787+ckenst@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ckenst <6896787+ckenst@users.noreply.github.com>

Author: Copilot

_layouts/default.html

@@ -8,7 +8,7 @@
   <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-5GDZ5BF" height="0" width="0"
       style="display:none;visibility:hidden"></iframe></noscript>
   <!-- End Google Tag Manager (noscript) -->
-  {% include banner.html %}
+  <!-- {% include banner.html %} -->
   {% include header.html %}
   <div class="page-content">
     <div class="wrapper">