I recently got a new router from Spark (Huawei HG630b) due to my old router dying out on me (Technicolor TG582n)

and I was just wondering that, is there a way to remove saved devices from router (since number of default saved devices is 16 unless you change it), 

because there are guests that come over once or twice and use our wifi, I would like to remove them since they won't be using it again and its taking up the "devices saved list". 

I just can't seem to find the option to remove them like I can in the old router.

Thank you