remove extra cache argument for lang tools

apps/browse/templates/browse/language_tools.html

@@ -26,7 +26,7 @@
 {% endmacro %}
 
 {% block content %}
-{% cache addons, extra=[lang_addons] %}
+{% cache addons %}
 <header>
   {{ impala_breadcrumbs([(None, title)]) }}
   <h1>{{ title }}</h1>