Some cleanup

Author: sreichel

phpstan.dist.neon

@@ -51,9 +51,6 @@ parameters:
         - app/code/core/Mage/Paypal/Model/Report/Settlement.php
         - lib/Varien/Io/Sftp.php
 
-        # Class backup/db was not found while trying to analyse it
-        - app/code/core/Mage/Adminhtml/controllers/System/BackupController.php
-
         # Dataflow/Model/Convert/Iterator.php
         - app/code/core/Mage/Dataflow/Model/Convert/Iterator.php