How do I remove a device (Z-Wave) without having the device

I moved and do NOT have the Z-Wave device any longer. (ie a light switch that stayed with the sold home) How do I remove this device? All info I found so far requires you to push a button on the actual device itself. -or- What is recommended on how to handle a move? (Start all over???) Thanks.

edit and delete from the mobile app. It will first go through a step looking for you to exclude it, but after that times out it gives you the option to force delete.