Hide update notification if notification center is enabled

* then the notification center already contains this info

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

apps/updatenotification/appinfo/app.php

@@ -33,7 +33,8 @@ if(\OC::$server->getConfig()->getSystemValue('updatechecker', true) === true) {
 
 	$userObject = \OC::$server->getUserSession()->getUser();
 	if($userObject !== null) {
-		if(\OC::$server->getGroupManager()->isAdmin($userObject->getUID())) {
+		if(\OC::$server->getGroupManager()->isAdmin($userObject->getUID()) &&
+			!\OC::$server->getAppManager()->isEnabledForUser('notifications')) {
 			if($updateChecker->getUpdateState() !== []) {
 				\OCP\Util::addScript('updatenotification', 'notification');
 				OC_Hook::connect('\OCP\Config', 'js', $updateChecker, 'getJavaScript');