Domain added. make sure to set your nameservers to ns1.heliohost.org and ns2.heliohost.org in the hostinger nameserver settings. You can find more information on how to do this here: https://support.hostinger.com/en/articles/1696789-how-to-change-nameservers-at-hostinger.
Translation: Yes, you can delete it, leaving only the manager folder or the manager.zip file.
Escalating this topic so this can be resolved by a root admin.