Remove unused code

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

src/Content/OEmbed.php

@@ -370,8 +370,6 @@ class OEmbed
 	 */
 	private static function iframe($src, $width, $height)
 	{
-		$a = \get_app();
-
 		if (!$height || strstr($height, '%')) {
 			$height = '200';
 		}

src/Content/Text/BBCode.php

@@ -1683,7 +1683,7 @@ class BBCode extends BaseObject
 
 		// Replace non graphical smilies for external posts
 		if ($simple_html) {
-			$text = Smilies::replace($text, false, true);
+			$text = Smilies::replace($text);
 		}
 
 		// Unhide all [noparse] contained bbtags unspacefying them