There are multiple ways to delete an asset, however if an asset is sold there are some steps through an Ads2trade admin that have to be taken for multiple legal reasons. However, if the asset has no deals made you can delete them by clicking the small blue circular button displaying a pencil which will take you to an edit screen, once you are in the edit screen you can click the small square button displaying a bin icon to remove the asset permanently after selecting okay on the pop up to assure that the deletion is what you are wanting.

This process is the same for deleting a deal. To see more about deals please visit the link Deals here.