The datasheets for all STM32G0xx devices report that only SWD is supported. No TDI/TDO pin is present. Drop swj support. Add swd transport. Remove swd transport from the associated board files. Change-Id: Ib29171dd614eb84346e90cb447bc7292465095ac Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-on: https://review.openocd.org/c/openocd/+/9425 Reviewed-by: Tomas Vanek <vanekt@fbl.cz> Tested-by: jenkins Reviewed-by: Ahmed Haoues <ahmed.haoues@st.com>