Revert some test changes

src/Protocol/ActivityPub/Processor.php

@@ -26,7 +26,6 @@ use Friendica\Content\Text\HTML;
 use Friendica\Content\Text\Markdown;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
-use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\APContact;

src/Protocol/ActivityPub/Receiver.php

@@ -1300,7 +1300,7 @@ class Receiver
 	 * @return array
 	 * @throws \Exception
 	 */
-	public static function processObject($object)
+	private static function processObject($object)
 	{
 		if (!JsonLD::fetchElement($object, '@id')) {
 			return false;