Remove Persona support

Persona is no longer supported by Mozilla, so let's remove it.

src/root/auth.tt

@@ -4,10 +4,6 @@
     <script src="https://apis.google.com/js/platform.js" async="1" defer="1"></script>
   [% END %]
 
-  [% IF c.user.type == 'persona' %]
-    <script src="https://login.persona.org/include.js"></script>
-  [% END %]
-
   <script>
     function finishSignOut() {
       $.post("[% c.uri_for('/logout') %]")
@@ -77,9 +73,6 @@
       [% IF c.config.enable_google_login %]
         $.getScript("https://apis.google.com/js/platform.js");
       [% END %]
-      [% IF c.config.enable_persona %]
-        $.getScript("https://login.persona.org/include.js");
-      [% END %]
     });
 
   </script>
@@ -104,25 +97,4 @@
     </script>
   [% END %]
 
-  [% IF c.config.enable_persona %]
-    <script>
-      $("#persona-signin").click(function() {
-
-        navigator.id.watch({
-          onlogin: function(assertion) {
-            requestJSON({
-              url: "[% c.uri_for('/persona-login') %]",
-              data: "assertion=" + assertion,
-              type: 'POST',
-              success: function(data) { window.location.reload(); },
-              postError: function() { navigator.id.logout(); }
-            });
-          }
-        });
-
-        navigator.id.request({ siteName: 'Hydra' });
-      });
-    </script>
-  [% END %]
-
 [% END %]

src/root/layout.tt

@@ -104,8 +104,7 @@
           <em><a href="http://nixos.org/hydra" target="_blank">Hydra</a> [% HTML.escape(version) %] (using [% HTML.escape(nixVersion) %]).</em>
           [% IF c.user_exists %]
           You are signed in as <tt>[% HTML.escape(c.user.username) %]</tt>
-            [%- IF c.user.type == 'persona' %] via Persona
-            [%- ELSIF c.user.type == 'google' %] via Google[% END %].
+            [%- IF c.user.type == 'google' %] via Google[% END %].
           [% END %]
         </small>
       </footer>

src/root/topbar.tt

@@ -136,10 +136,6 @@
         <li><a href="#" id="google-signin">Sign in with Google</a></li>
         <li class="divider"></li>
       [% END %]
-      [% IF c.config.enable_persona %]
-        <li><a href="#" id="persona-signin">Sign in with Persona</a></li>
-        <li class="divider"></li>
-      [% END %]
       <li>
         <a href="#hydra-signin" data-toggle="modal">Sign in with a Hydra account</a>
       </li>