To remove a property, select the listing settings on the calendar (property name) > more settings > remove listing > then select the 'remove this listing' button.
This option is only available to account owners i.e. the user with the primary account on Uplisting. Invited users do not have this option.
Removing a listing will delete all bookings and any other settings you have in place. You can re-import your listings from Airbnb in future if required but will need to re-add any bespoke settings, unavailabilities and rates you have in place.