Drop c-ares references

Those are leftovers from osmo-sgsn.git

Change-Id: I2fabaa0d70d8675ba440d2bba6881a4cb0006861

debian/control

@@ -11,7 +11,6 @@ Build-Depends: debhelper (>=9),
                libtool,
                pkg-config,
                libtalloc-dev,
-               libc-ares-dev,
                libosmocore-dev (>= 1.4.0),
                osmo-gsm-manuals-dev
 Standards-Version: 3.9.8

debian/copyright

@@ -84,7 +84,6 @@ Files:     include/osmocom/sgsn/a_reset.h
            src/gprs/crc24.c
            src/gprs/gprs_gb_parse.c
            src/gprs/gprs_utils.c
-           src/gprs/sgsn_ares.c
            src/gbproxy/gb_proxy.c
            src/gbproxy/gb_proxy_main.c
            src/gbproxy/gb_proxy_peer.c
@@ -137,8 +136,7 @@ License:   AGPL-3.0+
  You should have received a copy of the GNU Affero General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-Files:     src/gtphub/gtphub_ares.c
-           src/gtphub/gtphub_sock.c
+Files:     src/gtphub/gtphub_sock.c
            tests/gbproxy/gbproxy_test.c
 Copyright: 2013 Jacob Erlbeck <jerlbeck@sysmocom.de>
            2013 sysmocom s.f.m.c. GmbH

tests/atlocal.in

@@ -1,3 +0,0 @@
-enable_sgsn_test='@found_libgtp_and_libcares@'
-enable_oap_test='@found_libgtp_and_libcares@'
-enable_gtphub_test='@found_libgtp_and_libcares@'

tests/sndcp_xid/Makefile.am

@@ -1,5 +1,5 @@
 AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include
-AM_CFLAGS=-Wall -ggdb3 $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBCARES_CFLAGS)
+AM_CFLAGS=-Wall -ggdb3 $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS)
 
 EXTRA_DIST = sndcp_xid_test.ok
 
@@ -13,8 +13,5 @@ sndcp_xid_test_LDADD = \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOGSM_LIBS) \
 	$(LIBOSMOGB_LIBS) \
-	$(LIBCARES_LIBS) \
 	$(LIBGTP_LIBS) \
 	-lrt -lm
-
-