do not cache csrf_meta_tag

oh my.

Author: azul

app/assets/javascripts/crabgrass/wiki.js

@@ -121,8 +121,7 @@ var wikiLock = {
     var url = this.locks.get(wikiId);
     this.locks.unset(wikiId); // <- prevent additional unlocking
     new Ajax.Request(url, {
-      method: 'delete', asynchronous: false,
-      parameters: {authenticity_token: $$('meta[name=csrf-token]')[0]}
+      method: 'delete', asynchronous: false
     });
   }
 }

app/helpers/common/ui/layout_helper.rb

@@ -127,8 +127,6 @@ def crabgrass_javascripts
       lines << '<![endif]-->'
     end
 
-    lines << csrf_meta_tag
-
     # Autocomplete caches results in sessionStorage. After logging out, the session storage should be cleared.
     unless logged_in?
       lines.push('<script type="text/javascript">if(sessionStorage.length > 0) sessionStorage.clear();</script>')

app/views/layouts/global/_head.html.haml

@@ -9,7 +9,7 @@
   / begin scripts
   = crabgrass_javascripts
   / end scripts
-
+= csrf_meta_tag
 %title
   =h html_title
 =# call_hook :html_head