Delete Not Present switch from VC

Hello Experts,

root> show virtual-chassis | grep NotPrsnt 
2 (FPC 2)  NotPrsnt PE3718010358 ex4300-48t    
8 (FPC 8)  NotPrsnt              unknown       
9 (FPC 9)  NotPrsnt              unknown       

Is there anyway we can delete the not present switches from VC?

root> show configuration virtual-chassis 
member 6 {
    mastership-priority 255;
}
member 1 {
    mastership-priority 254;
}

{master:6}
root>