ref-manual/classes.rst: insane: drop cve_status_not_in_db

This was dropped by commit 452e605b55ad ("cve-check: annotate CVEs
during analysis").

(From yocto-docs rev: 4c94ef90e01b6aa7e7eaae8776135b615d0d6069)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit 55aedec94dce3e3c0541ffaea666cff02d63a708)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

documentation/ref-manual/classes.rst

@@ -1395,11 +1395,6 @@ The tests you can list with the :term:`WARN_QA` and
    paths to locations on the build host were used. Using such paths
    might result in host contamination of the build output.
 
--  ``cve_status_not_in_db:`` Checks for each component if CVEs that are ignored
-   via :term:`CVE_STATUS`, that those are (still) reported for this component
-   in the NIST database. If not, a warning is printed. This check is disabled
-   by default.
-
 -  ``debug-deps:`` Checks that all packages except ``-dbg`` packages
    do not depend on ``-dbg`` packages, which would cause a packaging
    bug.