Well Joko, I agree that the second partition looks to be too large just for recovery purposes. I don't know anything about Windows 8 but there must be some way of displaying "invisible" system files like there is in earlier versions of Windows - if that shows the partition to be truly empty I can see no reason why you shouldn't merge the two partitions.
Read Buenchico's link first, though. He knows what he's talking about computer-wise and you might find there is adantage to you in keeping some things on a separate partition (I do).