Log in to the Aura app.
Navigate to the setting section.
Tap the Z-Wave section under system settings.
Select the Location location where you will be removing your node.
Select the controller where the Z-Wave node is already there.
Tap on remove node.
Select the node to be removed and tap the remove node button.
Follow the instruction to unpair Z-Wave node from the controller.
Case 1 : For Switch/Double switch/Dimmer – Press the button on Z-wave device twice until its removed.
Case 2 : For Touch Panels – Long press on any one endpoint on the touch panel until it blinks and then tap once.
Reference video