work around bogus compiler warnings

Change-Id: I9170e4de857c1f3e003a480b12dd16fe796ec763
diff --git a/daemon/gtp_tunnel.c b/daemon/gtp_tunnel.c
index 0d049c7..f9075f7 100644
--- a/daemon/gtp_tunnel.c
+++ b/daemon/gtp_tunnel.c
@@ -83,6 +83,7 @@
 	return NULL;
 }
 
+#if 0
 /* find tunnel by R(x_teid), T(x_teid) + A(ddr) */
 static struct gtp_tunnel *
 _gtp_tunnel_find_rta(struct gtp_daemon *d, uint32_t rx_teid, uint32_t tx_teid,
@@ -96,6 +97,7 @@
 	}
 	return NULL;
 }
+#endif
 
 /* find tunnel by R(x_teid) + optionally local endpoint */
 struct gtp_tunnel *