I discover something new today. I was figuring out how to delete my drafts ever since it was piling up and now I accidentally got to know how. Just go to the article you need to delete. On the side, you can see three dots, click it and you will see edit article. Your article will open and on the upper right side of your article there is Publish. On the Publish part, right click the three dots again and there is a Delete Article. That is the way to delete it.