no bootloader on vps

systems/gateway/hardware.nix

@@ -6,6 +6,9 @@
     [ "ata_piix" "uhci_hcd" "xen_blkfront" "vmw_pvscsi" ];
   boot.initrd.kernelModules = [ "nvme" ];
 
+  boot.loader.grub.enable = false;
+  boot.loader.systemd-boot.enable = false;
+
   fileSystems."/" = {
     device = "/dev/sda3";
     fsType = "btrfs";