Unused since introduction in 1.17 from 2015. OK?
Index: mroute6.c =================================================================== RCS file: /cvs/src/usr.bin/netstat/mroute6.c,v retrieving revision 1.23 diff -u -p -r1.23 mroute6.c --- mroute6.c 8 May 2017 09:31:34 -0000 1.23 +++ mroute6.c 3 Jun 2018 14:09:13 -0000 @@ -92,7 +92,6 @@ mroute6pr(void) struct mif6info *mif; size_t needed, mifi, nummifs, mfci, nummfcs; int banner_printed, saved_nflag; - mifi_t maxmif = 0; u_int mrtproto; int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_MRTPROTO }; size_t len = sizeof(int); @@ -119,8 +118,6 @@ mroute6pr(void) needed = get_sysctl(mib, sizeof(mib) / sizeof(mib[0]), &buf); nummifs = needed / sizeof(*mif); mif = (struct mif6info *)buf; - if (nummifs) - maxmif = mif[nummifs - 1].m6_mifi; banner_printed = 0; for (mifi = 0; mifi < nummifs; ++mifi, ++mif) {