Remove unsupported -Clean switch
Remove unsupported -Clean switch

Will put back when it is functional.

JamesWTruher/PowerShell-1,jsoref/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,KarolKaczmarek/PowerShell,kmosher/PowerShell,KarolKaczmarek/PowerShell,daxian-dbw/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,daxian-dbw/PowerShell,bmanikm/PowerShell,KarolKaczmarek/PowerShell,bmanikm/PowerShell,daxian-dbw/PowerShell,bingbing8/PowerShell,KarolKaczmarek/PowerShell,TravisEz13/PowerShell,bingbing8/PowerShell,bingbing8/PowerShell,TravisEz13/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,bmanikm/PowerShell,kmosher/PowerShell,jsoref/PowerShell,jsoref/PowerShell,kmosher/PowerShell,daxian-dbw/PowerShell,KarolKaczmarek/PowerShell,PaulHigin/PowerShell,jsoref/PowerShell,kmosher/PowerShell,bingbing8/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,jsoref/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1