Fix filemanager delete url path

app/assets/javascripts/admin/filemanager.js

@@ -69,7 +69,7 @@ $(document).ready(function(){
 		$("input[type=checkbox]:checked").each(function(){
 			items_to_delete.push($(this).val());
 		})
-		$.post("<%= delete_files_admin_assets_path %>",{"files":items_to_delete,"type":type},function(){
+		$.post("/admin/assets/delete_files",{"files":items_to_delete,"type":type},function(){
 			deleteBtn.hide();
 		})
 	})