another day, another compat gets removed. today is ibcs2's turn

src/etc/etc.i386/sysctl.conf

@@ -6,6 +6,5 @@
 #kern.emul.aout=1		# enable running dynamic OpenBSD a.out bins
 #kern.emul.bsdos=1		# enable running BSD/OS binaries
 #kern.emul.freebsd=1		# enable running FreeBSD binaries
-#kern.emul.ibcs2=1		# enable running iBCS2 binaries
 #kern.emul.linux=1		# enable running Linux binaries
 #kern.emul.svr4=1		# enable running SVR4 binaries