Removed unnecessary check for "/".

The DisplayAlias of a content item will not be set to "" or "/" for the item to become the homepage, so there's no need to check for the display alias to be "/".

src/Orchard.Web/Modules/Orchard.Autoroute/Handlers/AutoroutePartHandler.cs

@@ -91,14 +91,12 @@ namespace Orchard.Autoroute.Handlers {
             }
 
             // Check for permalink conflict, unless we are trying to set the home page.
-            if (part.DisplayAlias != "/") {
             var previous = part.Path;
             if (!_autorouteService.Value.ProcessPath(part))
                 _orchardServices.Notifier.Warning(
                     T("Permalinks in conflict. \"{0}\" is already set for a previously created {2} so now it has the slug \"{1}\"", 
                                                 previous, part.Path, part.ContentItem.ContentType));
         }
-        }
 
         void RemoveAlias(AutoroutePart part) {
             var homePageId = _homeAliasService.GetHomePageId();