refactor(config): setlocale comes with php since version 4

Author: fadrian06

app/config/config_sample.php

@@ -13,9 +13,7 @@
 mb_internal_encoding('UTF-8');
 
 // Set the default locale
-if (function_exists('setlocale') === true) {
-    setlocale(LC_ALL, 'en_US.UTF-8');
-}
+setlocale(LC_ALL, 'en_US.UTF-8');
 
 /*
  * Set some flight variables