fix: unused extruder primed on first layer (CURA-3339)
fix: unused extruder primed on first layer (CURA-3339)

alephobjects/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,Ultimaker/CuraEngine,ROBO3D/CuraEngine