Revert "Remove useless variable."

This reverts commit 71088f5f.

schulfrei_servicerating/cms_plugins.py

@@ -18,6 +18,7 @@ class ServiceRatingsPlugin(CMSPluginBase):
         context = super(ServiceRatingsPlugin, self).render(context, instance, placeholder)
 
         categories = ServiceCategory.objects.all().order_by('name')
+        ratings = ServiceRating.objects.all().order_by('-rating_total')
 
         context['categories'] = categories
         context['ratings'] = ratings