# File lib/heroku/api/mock.rb, line 156
      def self.remove_mock_app_addon(mock_data, app, addon)
        addon_data = mock_data[:addons][app].detect {|addon_data| addon_data['name'] == addon}
        mock_data[:addons][app].delete(addon_data)
        add_mock_release(mock_data, app, {'descr' => "Add-on remove #{addon_data['name']}"})
      end