We were adding a CentOS Stream specific SBAT component entry, but doesn't
really make sense since the RHEL 9 content is exactly the same. Otherwise,
in case of a revocation there will be needed two entries in the SbatLevel
variable for no good reasons.
Related: rhbz#1947696
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>