Fix code style

src/Spout/Autoloader/autoload.php

@@ -5,7 +5,7 @@ namespace Box\Spout\Autoloader;
 require_once 'Psr4Autoloader.php';
 
 /**
- * @var string $srcBaseDirectory
+ * @var string
  * Full path to "src/Spout" which is what we want "Box\Spout" to map to.
  */
 $srcBaseDirectory = dirname(dirname(__FILE__));