# File lib/chef/knife/cookbook_delete.rb, line 58
      def delete_all_without_confirmation
        # look up the available versions again just in case the user
        # got to the list of versions to delete and selected 'all'
        # and also a specific version
        @available_versions = nil
        Array(available_versions).each do |version|
          delete_version_without_confirmation(version)
        end
      end