move all_units to admin helper

app/helpers/spree/admin/general_settings_helper.rb

@@ -8,6 +8,10 @@ module Spree
         end
         options_from_collection_for_select(currencies, :first, :last, Spree::Config[:currency])
       end
+
+      def all_units
+        ["g", "oz", "lb", "kg", "T", "mL", "L", "kL"]
+      end
     end
   end
 end

app/views/spree/admin/general_settings/edit.html.haml

@@ -90,7 +90,6 @@
           %fieldset.available_units.no-border-bottom
             %legend{:align => "center"}= t('admin.available_units')
             .field
-              - all_units = ["g", "oz", "lb", "kg", "T", "mL", "L", "kL"]
               - selected_units = Spree::Config[:available_units].split(",")
               - all_units.each do |unit|
                 - selected = selected_units.include?(unit)