thus, it is not even needed and broken:

- the classes of Swiftmailer are already autoloaded by Composer
- using a PSR-0 autoloader for Swiftmailer is wrong, as the initialization file needs to be loaded before instantiating a class. This can either be done explicitly and then using the normal autoloader, or it can be done lazily thanks to the special Swiftmailer class loader (which is registered automatically when loading the Composer autoloader and Swiftmailer is installed through composer)