Remove Desktop Christmas Tree How Do I Get Rid Of The Desktop Christmas Tree? ?

How do i get rid of the desktop christmas tree? ? - remove desktop christmas tree

I downloaded this Christmas Desktop [http://www.liewcf.com/blog/wp-content/uploads/desktop-christmas-tree.jpg] just before Christmas as decoration for your desktop screen, but now Christmas is over and I have no idea how to delete? wheres the Uninstall button? Help! : D