As I understand it the underlying reason isn't to inhibit the stall warning below 60 it's to prevent spurious data when the airflow is outside the vanes spec. Stalled or not stalled, a warning that airspeed is less than 60 knots when there is no weight on the wheels would be equivalent. If that situation can only arise when stalled, then fair enough allow a warning. Seems quixotic to cancel an existing warning when the speed goes out of range and it is likely that that very same stall caused the speed to go out of range.