remove covid banner

Author: Joseph Damiba

_includes/layouts/_header-main.html

@@ -1,6 +1,3 @@
-<div id="covid-banner">
-    🏥 🏭 Working on the COVID-19 response in Canada? Plotly & the Canadian government can help you and your organization. <a target="_blank" href="https://chriddyp.typeform.com/to/oWAP3T">Learn more and get in touch.</a>
-</div>
 <header class="header-main --default">
     <div class="--wrap">
         <div class="--wrap-left">