Remove unused code

- Remove commented code
- Remove unused/immediately overwritten variables
- Remove extraneous parameters
- Remove unreachable code
- Remove duplicate array keys

src/Worker/DBClean.php

@@ -60,8 +60,6 @@ class DBClean {
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
 	private static function removeOrphans($stage) {
-		$count = 0;
-
 		// We split the deletion in many small tasks
 		$limit = Config::get('system', 'dbclean-expire-limit', 1000);