Update the footer and header to match HPR new website

hub/calendar.php

@@ -249,8 +249,6 @@ $next_show_date = date('Y-m-d', strtotime($show_array[$next_show_num - 1 ]["date
 $days_to_wait = floor((strtotime($next_show_date) - strtotime(gmdate('Y-m-d')))/(60*60*24));
 
 ?>
-<main id="maincontent">
-
 <h1>Upload Your Show</h1>
 
 <p>
@@ -360,9 +358,6 @@ If you wish to pick an available slot in the next 12 months then go directly to
 <h3 id="workflow">Workflow</h3>
 <p>
 The HPR statistics are regenerated every 15 minutes and are available in <a aria-label="Go to the stats json page" href="<?php echo "${hubBaseurl}"; ?>stats.json">json format</a>. Note the format is liable to change without notice.</p>
-
-</main>
-
 <?php
 include 'footer.php'; 
 ?>