Revert "pre-fill the domain"

This reverts commit 46b6992b52.
Signed-off-by: Simon L <szaimen@e.mail.de>

php/public/domain-prefill.js

@@ -1,7 +0,0 @@
-document.addEventListener("DOMContentLoaded", function(event) {
-    // domain
-    let domain = document.getElementById("domain_input");
-    if (domain) {
-        domain.value = window.location.host
-    }
-});