footer: remove equinix sponsorship

Author: yshalsager

_includes/footer.html

@@ -22,10 +22,6 @@
 	      "><a href="/sitemap/" class="icon solid fa-sitemap"><span class="label">Sitemap</span></a></li>
 	   <li><a href="/rss/" class="icon solid fa-rss"><span class="label">RSS</span></a></li>
 	</ul>
-	<ul class="copyright" data-ref="sponsorship"> 
-		<span>XiaomiFirmwareUpdater is sponsored by</span>
-		<a href='https://metal.equinix.com/' target="_blank"><img alt='Equinix Metal' src='/images/EM-Horizontal-Color.svg' width='250px' /></a>
-	</ul>
 	<ul class="copyright" data-ref="cookies">
 		<li>This website uses cookies. By using this website, you accept our policies.
 		Read our <a href="/privacy/">privacy policy</a> for more