TroveStar deletion is fairly straightfoward. There are two ways of doing it.
First way, invoke the item editor.
Then, scroll down to the bottom of the list of fields. You should see a button that reads 'Delete Item: XXXX'.
Push this button to go the delete item confirmation page.
Second way, when displaying the item, go to menu: Item → Delete.
This will lead you to the delete item confirmation page.
Please note that deleting an item requires to be a Curator of the database.
Likewise, any item can be brought back, but this requires a Curator intervention.