fixup! feat(dav): expose system address book

Author: miaulalala

apps/dav/lib/CardDAV/SystemAddressbook.php

@@ -314,9 +314,9 @@ private function extractCarddata(array $obj): ?string {
 	 * @throws Forbidden
 	 */
 	public function delete() {
-		if (!$this->isFederation()) {
-			throw new Forbidden();
+		if ($this->isFederation()) {
+			parent::delete();
 		}
-		parent::delete();
+		throw new Forbidden();
 	}
 }