This post above might help you remove the device. Thanks to the post from rspollock, I was also able to login to the adt canopy website. I did figure out if you go into the new smartthings app, click on the adt logo under home security, then manage account and Login you should be able to get to the same place. Once here scroll down to recent activity, click on your location name (in blue on my web browser). On that next screen you should see all your devices including the one that only shows on the panel (and not on the app). The gear on the right gives you the option to remove. I hope this helps.