msc: The udt_relay could be implemented with the normal cellmgr now

Simplify the code and remove the standalone udt_relay application,
the job can be done with cellmgr_ng. This will happen after we have
settled for a new config file format.
diff --git a/src/Makefile.am b/src/Makefile.am
index caf6f04..8071b72 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,7 +2,7 @@
 AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOSCCP_CFLAGS) $(LIBOSMOVTY_CFLAGS) \
 		$(NEXUSWARE_C7_CFLAGS) $(NEXUSWARE_UNIPORTE_CFLAGS) $(UNIPORTE)
 
-sbin_PROGRAMS = cellmgr_ng udt_relay osmo_stp mgcp_mgw
+sbin_PROGRAMS = cellmgr_ng osmo_stp mgcp_mgw
 
 mgcp_mgw_SOURCES = mgcp_ss7.c thread.c debug.c \
 		   mgcp/mgcp_protocol.c mgcp/mgcp_network.c mgcp/mgcp_vty.c
@@ -16,12 +16,6 @@
 cellmgr_ng_LDADD = $(LIBOSMOCORE_LIBS) $(LIBOSMOSCCP_LIBS) $(LIBOSMOVTY_LIBS) $(NEXUSWARE_C7_LIBS) \
 		   -lpthread -lnetsnmp -lcrypto
 
-udt_relay_SOURCES = main_udt.c mtp_layer3.c thread.c input/ipaccess.c pcap.c \
-		     msc_conn.c link_udp.c snmp_mtp.c debug.c vty_interface.c \
-		     bss_patch.c isup.c links.c sctp_m2ua.c mtp_link.c counter.c
-udt_relay_LDADD = $(LIBOSMOCORE_LIBS) $(LIBOSMOSCCP_LIBS) $(LIBOSMOVTY_LIBS) $(NEXUSWARE_C7_LIBS) \
-		   -lpthread -lnetsnmp -lcrypto -lm2ua -lsctp
-
 osmo_stp_SOURCES = main_stp.c mtp_layer3.c thread.c pcap.c link_udp.c snmp_mtp.c \
 		   debug.c vty_interface.c links.c isup.c sctp_m2ua.c \
 		   mtp_link.c counter.c