This value is overridden by Koji with the value set by Pungi for
the target RHEL version. Not having it here removes the assumption
that a valid version is being tracked here.
The bootable image support for ELN differs from boot.xml in
several ways:
* The images use XFS
* Several packages are dropped that are not present in ELN
Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
