ggsn: Drop unused param force in apn_stop()

Change-Id: I920679c7062d480c1cfaa3d89c90a0ed4a2ef58b
diff --git a/ggsn/ggsn_vty.c b/ggsn/ggsn_vty.c
index c6dc0d9..3f012d2 100644
--- a/ggsn/ggsn_vty.c
+++ b/ggsn/ggsn_vty.c
@@ -604,7 +604,7 @@
 	struct apn_ctx *apn = (struct apn_ctx *) vty->index;
 
 	if (!apn->cfg.shutdown) {
-		if (apn_stop(apn, false)) {
+		if (apn_stop(apn)) {
 			vty_out(vty, "%% Failed to Stop APN%s", VTY_NEWLINE);
 			return CMD_WARNING;
 		}