Remove Squeak 6.0 notification from front page. It has been there for…

… more than a year now.

index.html

@@ -64,9 +64,9 @@
   <span>❤️</span> Please help us keep our infrastructure up and running, which includes this website, our mailing lists, and code repositories. <b><a href="#" class="donate-button">Donate here...</a></b> <span>❤️</span>
 </div>
 
-<div class="alert alert-info text-center" role="alert">
+<!-- <div class="alert alert-info text-center" role="alert">
   <b>Squeak-6.0 bundles are out. <span>🎉</span> <a href="/downloads/">Grab 'em while they're hot!</a></b>
-</div>
+</div> -->
 
 
 <!-- <div class="alert alert-warning text-center" role="alert">