ipfw_del_eaction
int ipfw_del_eaction(struct ip_fw_chain *ch, uint32_t eaction_id);
ipfw_del_eaction(ch, V_nat64clat_eid);
ipfw_del_eaction(ch, V_nat64lsn_eid);
ipfw_del_eaction(ch, V_nat64stl_eid);
ipfw_del_eaction(ch, V_nptv6_eid);
ipfw_del_eaction(ch, V_tcpmod_setmss_eid);