Add background job declaration of dav app to info.xml

apps/dav/appinfo/application.php

@@ -153,11 +153,6 @@ class Application extends App {
 		return $this->getContainer()->query('SyncService');
 	}
 
-	public function setupCron() {
-		$jl = $this->getContainer()->getServer()->getJobList();
-		$jl->add(new SyncJob());
-	}
-
 	public function generateBirthdays() {
 		try {
 			/** @var BirthdayService $migration */

apps/dav/appinfo/info.xml

@@ -16,4 +16,7 @@
 	<dependencies>
 		<owncloud min-version="9.1" max-version="9.1" />
 	</dependencies>
+	<background-jobs>
+		<job>OCA\DAV\CardDAV\Sync\SyncJob</job>
+	</background-jobs>
 </info>

apps/dav/appinfo/install.php

@@ -22,5 +22,4 @@
 use OCA\Dav\AppInfo\Application;
 
 $app = new Application();
-$app->setupCron();
 $app->generateBirthdays();

apps/dav/appinfo/update.php

@@ -22,5 +22,4 @@
 use OCA\Dav\AppInfo\Application;
 
 $app = new Application();
-$app->setupCron();
 $app->generateBirthdays();