delete unreachable code in configureEncoder

        else if ( hEncoderConfig->ivas_format == SBA_ISM_FORMAT )

        {

            st_ivas->ism_mode = ISM_MODE_NONE;

            /*adapt element_mode according to the bit-rate*/

            if ( hEncoderConfig->element_mode_init != IVAS_SCE )

            {

                if ( st_ivas->hEncoderConfig->ivas_total_brate >= IVAS_48k )

                {

                    hEncoderConfig->element_mode_init = IVAS_CPE_MDCT;

                }

            }

        }

#endif

    }