Drop commented out test bootstrap

Author: Jean85

phpunit.xml.dist

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
-         bootstrap="tests/bootstrap.php"
+         bootstrap="vendor/autoload.php"
          colors="true"
          backupGlobals="false"
          backupStaticAttributes="false"