Simplify code checking whether to enable a locale

app/models/concerns/globalizable.rb

@@ -4,6 +4,10 @@ module Globalizable
   included do
     globalize_accessors
     accepts_nested_attributes_for :translations, allow_destroy: true
+
+    def locales_not_marked_for_destruction
+      translations.reject(&:_destroy).map(&:locale)
+    end
   end
 
   class_methods do