k3s: remove timeout for importing container images in test

The timeout caused the `airgap-images` test to fail on slower hardware.

Changed files
+1 -1
nixos
tests
+1 -1
nixos/tests/k3s/airgap-images.nix
···
start_all()
machine.wait_for_unit("k3s")
-
machine.wait_until_succeeds("journalctl -r --no-pager -u k3s | grep \"Imported images from /var/lib/rancher/k3s/agent/images/\"", timeout=120)
+
machine.wait_until_succeeds("journalctl -r --no-pager -u k3s | grep \"Imported images from /var/lib/rancher/k3s/agent/images/\"")
images = json.loads(machine.succeed("crictl img -o json"))
image_names = [i["repoTags"][0] for i in images["images"]]
with open("${k3s.imagesList}") as expected_images: