Cylinder Head Gasket Is It Necessary To Remove The Valves And Springs When Servicing Blown Cylinder Head Gasket?

Is it necessary to remove the valves and springs when servicing blown cylinder head gasket? - cylinder head gasket

I work at the head gasket to get away and replaced by a new board. However, stated in the manual, they, the valves and springs had to be eliminated. Since I am not at the service valves, they really need to remove valves and springs?