lil bugfix: no more redundant raft layer comments
lil bugfix: no more redundant raft layer comments

totalretribution/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,markwal/CuraEngine,pratikshashroff/pcura,pratikshashroff/pcura,Ultimaker/CuraEngine,alephobjects/CuraEngine,markwal/CuraEngine,Ultimaker/CuraEngine,totalretribution/CuraEngine,alephobjects/CuraEngine,markwal/CuraEngine,totalretribution/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine