Remove unneeded scope

In this case using `joins` doesn't prevent N+1 queries to get titles for
every record, and since we cannot order translations with just SQL due
to fallbacks, we don't need it.

Automatic SQL injection checks were showing a false positive in this
scope; there was no real vulnerability here because foreign keys, table
names and locales were under our control.

app/models/concerns/globalizable.rb

@@ -29,8 +29,6 @@ module Globalizable
       translation_class.send :acts_as_paranoid, column: :hidden_at
     end
 
-    scope :with_translation, -> { joins("LEFT OUTER JOIN #{translations_table_name} ON #{table_name}.id = #{translations_table_name}.#{reflections["translations"].foreign_key} AND #{translations_table_name}.locale='#{I18n.locale}'") }
-
     private
 
       def required_attribute?(attribute)