bsc_subscr_conn_fsm: Use gscon_bssmap_clear() helper on send failure

Change-Id: I45b42b76c260a5bac416ad3a5761918a8ab59f86
diff --git a/src/osmo-bsc/bsc_subscr_conn_fsm.c b/src/osmo-bsc/bsc_subscr_conn_fsm.c
index 7b9f912..0830dee 100644
--- a/src/osmo-bsc/bsc_subscr_conn_fsm.c
+++ b/src/osmo-bsc/bsc_subscr_conn_fsm.c
@@ -984,7 +984,6 @@
 {
 	uint8_t sapi;
 	int rc;
-	struct msgb *resp = NULL;
 
 	if (!conn->lchan) {
 		LOGP(DMSC, LOGL_ERROR,
@@ -1027,8 +1026,7 @@
 
 failed_to_send:
 	LOGPFSML(conn->fi, LOGL_ERROR, "Tx BSSMAP CLEAR REQUEST to MSC\n");
-	resp = gsm0808_create_clear_rqst(GSM0808_CAUSE_EQUIPMENT_FAILURE);
-	gscon_sigtran_send(conn, resp);
+	gscon_bssmap_clear(conn, GSM0808_CAUSE_EQUIPMENT_FAILURE);
 	osmo_fsm_inst_state_chg(conn->fi, ST_ACTIVE, 0, 0);
 }