If you want delete an order (Only Back office),
you can use the string deleteorder in the url:
i.e.
See the order (Only Back office),
h**p://demo.mysite.com/index.php?tab=AdminOrders&id_order=1&vieworder&token=4'0986904586'9485'60897640576897
change the url in this way
h**p://demo.mysite.comt/index.php?tab=AdminOrders&id_order=1&deleteorder&token=4'0986904586'9485'60897640576897