archlinux: clean references to my server

(cherry picked from commit 18e1952e432560b93b79be8ab7dc26a725340e9c)

archlinux/PKGBUILD-qubes-repo-4.1.conf

@@ -1,3 +1,3 @@
 [qubes-r4.1]
 #Replace the server below with your own
-Server = https://neowutran.ovh/qubes/vm-archlinux/pkgs/
+#Server = https://YOUR_OWN_SERVER