Deathorizing a device from Apple ID/Music/Store
I was able to remove a device from my Apple account:
- Click the Apple logo in the upper-left corner.
- Select System Settings.
- Click where it shows "Apple ID" in the upper left.
- Scroll down to "Devices" where it lists all your devices.
- Select the device to remove
- Click the "Remove from Account" button
- Click the "Remove" button to confirm.
- Close and reopen System Settings.
- Go to Apple ID
- The device is no longer listed under "Devices"
