Reverted composer autoloader patch (#2791)

Author: sreichel

app/Mage.php

@@ -48,14 +48,6 @@
 
 Varien_Autoload::register();
 
-/** AUTOLOADER PATCH **/
-if (file_exists($autoloaderPath = BP . DS . 'vendor/autoload.php') ||
-    file_exists($autoloaderPath = BP . DS . '../vendor/autoload.php')
-) {
-    require $autoloaderPath;
-}
-/** AUTOLOADER PATCH **/
-
 /* Support additional includes, such as composer's vendor/autoload.php files */
 foreach (glob(BP . DS . 'app' . DS . 'etc' . DS . 'includes' . DS . '*.php') as $path) {
     include_once $path;