[PMakowski] squizlabs#2.5.1.x-dev: fix after rebase

Author: Piotr Makowski

CodeSniffer.php

@@ -269,10 +269,6 @@ public function __construct(
      */
     public static function autoload($className)
     {
-        if (class_exists($className, false) === true) {
-            return;
-        }
-        
         if (substr($className, 0, 4) === 'PHP_') {
             $newClassName = substr($className, 4);
         } else {