Remove patchelf page

No need for this page, https://github.com/NixOS/patchelf can serve as
a home page for this project (though the README should be converted to
markdown).

Makefile

@@ -15,7 +15,7 @@ HTML = index.html news.html \
   nixos/community.html nixos/packages.html nixos/options.html \
   nixos/security.html nixos/foundation.html \
   nixos/wiki.html \
-  patchelf.html hydra/index.html \
+  hydra/index.html \
   disnix/index.html disnix/download.html disnix/docs.html \
   disnix/extensions.html disnix/examples.html disnix/support.html \
   nixops/index.html

layout.tt

@@ -125,9 +125,6 @@
               </ul>
               <ul class="nav pull-right">
                 <li><a href="https://github.com/svanderburg/disnix"><i class="fa fa-github"></i></a></li>
-            [% ELSIF menu == 'patchelf' %]
-              <ul class="nav pull-right">
-                <li><a href="https://github.com/NixOS/patchelf"><i class="fa fa-github"></i></a></li>
             [% ELSIF menu == 'organization' %]
               <ul class="nav pull-right">
                 <li><a href="https://github.com/NixOS/nixpkgs"><i class="fa fa-github"></i></a></li>