Bluetooth can be super handy for short-range wireless communication, but with so many devices supporting it, you might sometimes find yourself in situations where the list of Bluetooth devices appearing in your iPhone, iPad, or iPod touch’s list becomes unmanageable. Thankfully, Apple built in a way to get rid of listings for devices you don’t use.
Simply fire up Settings, tap on Bluetooth, and tap on the blue circle next to the device you’d rather not see again. On the next page, tap on Forget this Device, and you won’t see it again.
If you decide at some point in the future that you want to use a forgotten device again, just set it to pairing mode and it will reappear in your list. [via CoM].