[Cita][#1246]remove unused variable retval_str
@@ -108,7 +108,6 @@ BOAT_RESULT BoatCitaTxInit(BoatCitaWallet *wallet_ptr,
BCHAR *recipient_str,
BUINT64 quota)
{
- BCHAR *retval_str = NULL;
BOAT_RESULT result;
BUINT64 valid_until_block_value;
