You can delete a user, if required. Click on Users link available in the left sidebar. The sub-links appear as below.
Click on All Users link. The All Users page appears where you can see the list of all users.
Locate the target user in the list.
In Action column, click on View button for the target user.
Click on Delete button available in the user details area.
The backend system asks you to confirm to delete the user. Click on Ok to confirm.