If you want to delete the particular user from the list of users, then click on the delete icon, located at right hand side of the user you want to delete.
After you click on that icon, an alert message comes to your screen that tell you that if you want to delete the user then you have to assign the tasks of that particular user to any other user from the given drop-down list.
After selecting another user, click on “Delete” button to delete the user from the list else exit from the page.