diff --git a/src/MagentoHackathon/Composer/Magento/Installer/CoreInstaller.php b/src/MagentoHackathon/Composer/Magento/Installer/CoreInstaller.php
index ba0b15f4..113ae5b3 100644
--- a/src/MagentoHackathon/Composer/Magento/Installer/CoreInstaller.php
+++ b/src/MagentoHackathon/Composer/Magento/Installer/CoreInstaller.php
@@ -74,17 +74,6 @@ class CoreInstaller extends MagentoInstallerAbstract
             'var'
         );
 
-    /**
-     * Directories that persist between Updates
-     *
-     * @var array
-     */
-    protected $persistentDirs
-        = array(
-            'media',
-            'var'
-        );
-
     /**
      * @param IOInterface $io
      * @param Composer    $composer