There is one small problem about removing the baseboard: the firmware will not be able to detect the baseboard and using its I2C address to decide which type of baseboard it is, and will consequently default to AC driver board (instead of DC in your case). The only issue with this is that it won’t engage the boost converter to generate the boosted voltage. If you don’t need the boosted voltage, this is ok. Pretty much the only difference between AC driver board and DC driver board, in terms of software operation, is the boost converter.