NgATM: Remove netgraph ATM support

Most ATM support was removed prior to FreeBSD 12.  The netgraph support
was kept as it was less intrusive, but it is presumed to be unused.

Reviewed by:	manu
Relnotes:	yes
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D38879

ObsoleteFiles.inc

@@ -52,6 +52,49 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20230309: remove remaining ATM support
+OLD_FILES+=usr/bin/sscop
+OLD_FILES+=usr/include/netnatm/addr.h
+OLD_FILES+=usr/include/netnatm/api/atmapi.h
+OLD_FILES+=usr/include/netnatm/api/ccatm.h
+OLD_FILES+=usr/include/netnatm/api/unisap.h
+OLD_DIRS+=usr/include/netnatm/api
+OLD_FILES+=usr/include/netnatm/msg/uni_config.h
+OLD_FILES+=usr/include/netnatm/msg/uni_hdr.h
+OLD_FILES+=usr/include/netnatm/msg/uni_ie.h
+OLD_FILES+=usr/include/netnatm/msg/uni_msg.h
+OLD_FILES+=usr/include/netnatm/msg/unimsglib.h
+OLD_FILES+=usr/include/netnatm/msg/uniprint.h
+OLD_FILES+=usr/include/netnatm/msg/unistruct.h
+OLD_DIRS+=usr/include/netnatm/msg
+OLD_FILES+=usr/include/netnatm/saal/sscfu.h
+OLD_FILES+=usr/include/netnatm/saal/sscfudef.h
+OLD_FILES+=usr/include/netnatm/saal/sscop.h
+OLD_FILES+=usr/include/netnatm/saal/sscopdef.h
+OLD_DIRS+=usr/include/netnatm/saal
+OLD_FILES+=usr/include/netnatm/sig/uni.h
+OLD_FILES+=usr/include/netnatm/sig/unidef.h
+OLD_FILES+=usr/include/netnatm/sig/unisig.h
+OLD_DIRS+=usr/include/netnatm/sig
+OLD_FILES+=usr/include/netnatm/unimsg.h
+OLD_DIRS+=usr/include/netnatm
+OLD_FILES+=usr/lib/libngatm.a
+OLD_FILES+=usr/lib/libngatm.so
+OLD_LIBS+=usr/lib/libngatm.so.4
+OLD_FILES+=usr/lib/libngatm_p.a
+OLD_FILES+=usr/share/man/man1/sscop.1.gz
+OLD_FILES+=usr/share/man/man3/libngatm.3.gz
+OLD_FILES+=usr/share/man/man3/uniaddr.3.gz
+OLD_FILES+=usr/share/man/man3/unifunc.3.gz
+OLD_FILES+=usr/share/man/man3/unimsg.3.gz
+OLD_FILES+=usr/share/man/man3/unisap.3.gz
+OLD_FILES+=usr/share/man/man3/unistruct.3.gz
+OLD_FILES+=usr/share/man/man4/ng_ccatm.4.gz
+OLD_FILES+=usr/share/man/man4/ng_sscfu.4.gz
+OLD_FILES+=usr/share/man/man4/ng_sscop.4.gz
+OLD_FILES+=usr/share/man/man4/ng_uni.4.gz
+OLD_FILES+=usr/share/man/man4/ngatmbase.4.gz
+
 # 20230308: machine-id merged into hostid_save
 OLD_FILES+=etc/rc.d/machine-id