Drop support for `ignition-network-kcmdline` in `image.yaml`
We moved to conditional networking a long time ago.
@@ -423,7 +423,6 @@ def flatten_image_yaml(srcfile, base=None):
# first, special-case list values
merge_lists(base, srcyaml, 'extra-kargs')
- merge_lists(base, srcyaml, 'ignition-network-kcmdline')
# then handle all the non-list values
base = merge_dicts(base, srcyaml)
