AssetIterator: rewrite to standard Iterator interface

controllers/ViewTimeline.php

@@ -54,10 +54,4 @@ class ViewTimeline extends HTMLController
 		// Set the canonical url.
 		$this->page->setCanonicalUrl(BASEURL . '/timeline/');
 	}
-
-	public function __destruct()
-	{
-		if (isset($this->iterator))
-			$this->iterator->clean();
-	}
 }