Hi Miramar,
You always retract the flaps one stage during the go-around, even during landing in Config 3, ie you would go from Config 3 to Config 2. (See FCOM 4.05.80 - Task Sharing During Go-Around)
I think the confusion may stem from the fact that during normal acceleration after take-off you would go from Config 3 to Config 1. This is not the case during the go-around however.