When importing data from an integration all the listings are imported, If you have old listings or listings that you no longer want to be on your dashboard you can hide these listings. It's not possible to 'delete' a single listing unless you want to remove an integration which will delete all listings and their associated data.
To hide a listing simply go to either the portfolio or dynamic pricing dashboard.
Then select the icon highlighted below with the eye symbol. This will then hide that listing from your dashboard.
To bring back a listing/unhide a listing simply select the 'Show hidden' button on the dashboard and select the same icon with an eye.
