chore: remove openssh for now

tests/ssh-preseed.nix

@@ -1,37 +0,0 @@
-{ pkgs, self }:
-let
-  lib = pkgs.lib;
-  test-common = import ./common.nix { inherit self lib pkgs; };
-  sshKeys = import (pkgs.path + "/nixos/tests/ssh-keys.nix") pkgs;
-
-  image = test-common.makeImage {
-    system.image.sshKeys.keys = [ sshKeys.snakeOilPublicKey ];
-    system.extraDependencies = [ sshKeys.snakeOilPrivateKey ];
-  };
-
-in
-test-common.makeImageTest {
-  name = "ssh-preseed";
-  inherit image;
-  script = ''
-    start_tpm()
-    machine.start()
-
-    machine.wait_for_unit("multi-user.target")
-
-    machine.succeed("[ -e /efi/default-ssh-authorized-keys.txt ]")
-    machine.succeed("[ -e /var/home/admin/.ssh/authorized_keys ]")
-
-    machine.wait_for_open_port(22)
-
-    machine.succeed(
-        "cat ${sshKeys.snakeOilPrivateKey} > privkey.snakeoil"
-    )
-    machine.succeed("chmod 600 privkey.snakeoil")
-
-    machine.succeed(
-      "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i privkey.snakeoil admin@127.0.0.1 true",
-      timeout=30
-    )
-  '';
-}