The iCloud website recently had an overhaul. How does it work and what can it do?
Remove old and unwanted devices from your Apple ID
If you have Apple devices you no longer use associated with your Apple ID, you can remove them. Open the System Settings app (Mac) or Settings (iPad and iOS devices), and tap your name at the top of the list. Scroll up to the list of your Apple gear, tap/click on any you no longer use and use the ‘Remove from Account’ link.