How to take off a device from iCloud?

So apparently apple only lets you have 5 devices connected to your iCloud (syncs all your music, videos, ect) that you buy to all your phones. But now my mom doesn't have an iphone and i want to take her off so i can add my new macbook. Anyone know how i can do that?

On the iphone u wish 2 remive go into settings and go to i cloud and delete yoyr acvount. If that doesn't work do it from the website or just call support.