I understand the command for a 'go round' was given, whereby the flap setting would be changed anyway from a landing configuration. If this is so, then the flap retraction and its subsequent benefit, was by default.
Was the command "go round" given?
I doubt it, given the situation was a developing undershoot being caused by a lack of power, despite firewalling the thrust levers. What would you "go-around"
with at this point?
Not all go-arounds require a change of flap setting, so a call could be "go-around" or "go-around flap X", depending...