Replace BaseObject class with DI::* calls

mod/notifications.php

@@ -13,6 +13,7 @@ use Friendica\Core\Protocol;
 use Friendica\Core\Renderer;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
+use Friendica\DI;
 use Friendica\Module\Security\Login;
 use Friendica\Model\Introduction;
 use Friendica\Model\Notify;
@@ -61,8 +62,7 @@ function notifications_content(App $a)
 
 	$json = (($a->argc > 1 && $a->argv[$a->argc - 1] === 'json') ? true : false);
 
-	/** @var Notify $nm */
-	$nm = \Friendica\BaseObject::getClass(Notify::class);
+	$nm = DI::notify();
 
 	$o = '';
 	// Get the nav tabs for the notification pages