Add remove_column in money migration

db/migrate/20120204185932_add_money_to_user.rb

@@ -1,5 +1,9 @@
 class AddMoneyToUser < ActiveRecord::Migration
-  def change
+  def up
     add_column :users, :money, :float, :default=>0.0
   end
+  
+  def down
+    remove_column :users, :money
+  end
 end