Remove unused to_sql_with_foreign_keys and lob_columns
Since #317 merged to master this to_sql_with_foreign_keys method is not used

@@ -34,8 +34,6 @@ module ActiveRecord
       def self.included(base) #:nodoc:
         base.class_eval do
           alias_method_chain :references, :foreign_keys
-          #alias_method_chain :to_sql, :foreign_keys
-
           alias_method_chain :column, :virtual_columns
         end
       end
@@ -116,16 +114,6 @@ module ActiveRecord
         end
       end

-      def to_sql_with_foreign_keys #:nodoc:
-        sql = to_sql_without_foreign_keys
-        sql << ', ' << (foreign_keys * ', ') unless foreign_keys.blank?
-        sql
-      end
-
-      def lob_columns