Code review comment for ~adam-collard/maas-images:drop-xgene-lunar

This was discussed on MM between myself, Dann and Adam.
The latest lunar maas images are unusable due to https://bugs.launchpad.net/cloud-init/+bug/2009746. Maas image builds are failing due to a size check for these xgene systems (the kernel since moving to 6.2 has grown too large). I feel it's reasonable to drop xgene systems for now to get a working image out for release day.

Assuming this is just removing the xgene flavor for lunar, I'm +1.