remove some commented-out cruft

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3898 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/associations/has_and_belongs_to_many_association.rb

@@ -145,10 +145,6 @@ def delete_records(records)
           end
         end
         
-        #def aliased_join_table_name
-        #  @reflection.options[:join_table]
-        #end
-        
         def construct_sql
           interpolate_sql_options!(@reflection.options, :finder_sql)