osmo-bsc: Don't try to package anything bsc-nat related

osmo-bsc_nat has been fully removed from osmo-bsc.git in
1c9b8b19176854ecf4a3d57e9eef6b495361557f.

Instead, build the one from openbsc.git.

Change-Id: I98109914d53cce1880f259f5d8d366879c2aff61
diff --git a/recipes-osmocom/osmo-bsc/osmo-bsc.inc b/recipes-osmocom/osmo-bsc/osmo-bsc.inc
index f20362f..d066a58 100644
--- a/recipes-osmocom/osmo-bsc/osmo-bsc.inc
+++ b/recipes-osmocom/osmo-bsc/osmo-bsc.inc
@@ -14,12 +14,11 @@
 	install -d ${D}${sysconfdir}/osmocom/
 
 	install -m 0644 ${S}/doc/examples/osmo-bsc/osmo-bsc.cfg ${D}${sysconfdir}/osmocom/
-	install -m 0644 ${S}/doc/examples/osmo-bsc_nat/osmo-bsc_nat.cfg ${D}${sysconfdir}/osmocom/
 
 	install -m 0644 ${S}/contrib/systemd/osmo-bsc.service ${D}${systemd_system_unitdir}/
 }
 
-PACKAGES =+ "osmo-bsc-nat-doc osmo-bsc-nat meas-utils ipaccess-utils bs11-utils abisip-find"
+PACKAGES =+ "meas-utils ipaccess-utils bs11-utils abisip-find"
 SYSTEMD_PACKAGES = "osmo-bsc"
 SYSTEMD_SERVICE_osmo-bsc = "osmo-bsc.service"
 
@@ -43,11 +42,3 @@
 		${bindir}/osmo-meas-pcap2db \
 		${bindir}/meas_json \
 		"
-
-FILES_osmo-bsc-nat = " \
-		${bindir}/osmo-bsc_nat \
-		${sysconfdir}/osmocom/osmo-bsc_nat.cfg \
-		"
-CONFFILES_osmo-bsc-nat = "${sysconfdir}/osmocom/osmo-bsc_nat.cfg"
-
-FILES_osmo-bsc-nat-doc = " ${docdir}/osmo-bsc/examples/osmo-bsc_nat "