You can only remove lease objects that are not associated with any leases.
To remove a lease object from Pythagoras Web:
Open a lease object. For more information on how to do so, see section 11.1.
Go to the lease object card (see image below).
Click "More options" (see the first image below). When you do so, a menu will open (see the second image below).
Click "Delete lease object" in the menu (see the first image below). When you do so, a dialog asking the following question will open: "Are you sure you want to delete this lease object?" (see the second image below).
Click "Delete" in the dialog (see the first image below). When you do so, the lease object you are working with will be removed from Pythagoras Web. At the same time you will be redirected back to the object list (see the second image below).