Ditch wrong .lead copy.

Author: Florian Kissling

docs/announcements-4.0.html

@@ -8,12 +8,6 @@
     <h1>Pre-release notes</h1>
     <p class="lead">
       The 4.0 release is ready for early adopters interested in testing it out.
-      You can use the development version, available on GitHub, by getting the
-      source code available in the <code>select2-ng</code> branch. The source
-      code can be
-      <a href="https://github.com/select2/select2/archive/select2-ng.zip">
-        downloaded as a <code>zip</code> archive
-      </a> as well.
     </p>
   </div>
 </section>