chg: [internal] Simplified Attribute::deleteAttribute method
chg: [internal] Simplified Attribute::deleteAttribute method

SteveClement/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP