package/libnids: drop LIBNIDS_IGNORE_CVES

NVD database has been updated:
https://nvd.nist.gov/vuln/search/results?form_type=Advanced&results_type=overview&seach_type=all&query=cpe:2.3:a:libnids_project:libnids:1.24:*:*:*:*:*:*:*



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>