delete remove_whitespace filter

inc/template.php

@@ -91,7 +91,6 @@ class Tinyboard extends Twig\Extension\AbstractExtension
 			new Twig\TwigFilter('hasPermission', 'twig_hasPermission_filter'),
 			new Twig\TwigFilter('date', 'twig_date_filter'),
 			new Twig\TwigFilter('poster_id', 'poster_id'),
-			new Twig\TwigFilter('remove_whitespace', 'twig_remove_whitespace_filter'),
 			new Twig\TwigFilter('count', 'count'),
 			new Twig\TwigFilter('ago', 'ago'),
 			new Twig\TwigFilter('until', 'until'),
@@ -143,10 +142,6 @@ function twig_push_filter($array, $value) {
 	return $array;
 }
 
-function twig_remove_whitespace_filter($data) {
-	return preg_replace('/[\t\r\n]/', '', $data);
-}
-
 function twig_date_filter($date, $format) {
 	return gmstrftime($format, $date);
 }