always normalize unicode strings

Signed-off-by: abdellah <als.abdellah@gmail.com>

Author: haikyuu

lib/private/legacy/OC_Util.php

@@ -1064,10 +1064,6 @@ public static function getTheme() {
 	 * @return bool|string
 	 */
 	public static function normalizeUnicode($value) {
-		if (Normalizer::isNormalized($value)) {
-			return $value;
-		}
-
 		$normalizedValue = Normalizer::normalize($value);
 		if ($normalizedValue === null || $normalizedValue === false) {
 			\OC::$server->getLogger()->warning('normalizing failed for "' . $value . '"', ['app' => 'core']);