Samsung Galaxy Note4 User Manual page 124

Delete a Paired Device (Unpairing)
When you unpair from a Bluetooth device, the two
devices will no longer recognize each other. To
connect again, you'd need to pair the devices.
1. From a Home screen, tap
2. Tap Bluetooth, and then tap the ON/OFF switch to
turn on Bluetooth.
3. Tap Settings next to the previously paired
device, and then tap Unpair to delete the paired
device.
Settings
Apps > Settings.
117
Bluetooth