perform_without_block

# File lib/drb/drb.rb, line 1546
      def perform_without_block
        if Proc === @obj && @msg_id == :__drb_yield
          if @argv.size == 1
            ary = @argv
          else
            ary = [@argv]
          end
          ary.collect(&@obj)[0]
        else
          @obj.__send__(@msg_id, *@argv)
        end
      end