Code review comment for lp:~ubuntu-on-ec2/vmbuilder/jenkins_kvm-norootdelay-cosmic

I'm not convinced (a) that we should make this change in release week, and (b) that we actually need it; the cosmic images aren't going to go out booting without initrds, and we should be focused on landing the Azure-on-Alan work and backporting it instead of maintaining these scripts.

(If we really want to, we could land it in the dd scripts for the hopefully-short period of time before we switch to Alan publication.)