spec: Drop checks for old Fedora releases
spec: Drop checks for old Fedora releases

The oldest Fedora release supported by the spec file is 26. Checking for
anything older makes no sense.

Signed-off-by: Jiri Denemark <62bdf77dc47919a4d59a91822129d14633cfca81@redhat.com>
Reviewed-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

olafhering/libvirt,andreabolognani/libvirt,zippy2/libvirt,eskultety/libvirt,eskultety/libvirt,jardasgit/libvirt,andreabolognani/libvirt,olafhering/libvirt,libvirt/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,olafhering/libvirt,andreabolognani/libvirt,crobinso/libvirt,jardasgit/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,jardasgit/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt,zippy2/libvirt,libvirt/libvirt,eskultety/libvirt,eskultety/libvirt,zippy2/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,eskultety/libvirt,nertpinx/libvirt,jfehlig/libvirt,crobinso/libvirt,crobinso/libvirt,crobinso/libvirt,libvirt/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jfehlig/libvirt,andreabolognani/libvirt,jfehlig/libvirt