<% Layout.deletelink %>
render a link for deleting the layout, but only if layout is *not* the currently active layout

Sourcecode in Layout/macros.js:
1:   function deletelink_macro(param) {
2:      if (this.isDefaultLayout() || this.sharedBy.size() > 0)
3:         return;
4:      Html.link({href: this.href("delete")},
5:                param.text ? param.text : getMessage("generic.delete"));
6:      return;
7:   }