See here: https://github.com/mozilla-iot/zigbee-adapter/issues/174
Essentially, do the following:
- Stop the gateway, e.g.
sudo systemctl stop mozilla-iot-gateway
- Open
~/.mozilla-iot/data/zigbee-adapter/zb-xxxxxxxxxxxxxxxx.json
- Remove any nodes you no longer want.
- Save the file.
- Start the gateway:
sudo systemctl start mozilla-iot-gateway