Set-Variable -Name TargetPath     -Value "e:\test1" -Scope Local -Force
Set-Variable -Name TargetPathList -Value $NULL      -Scope Local -Force
Clear-Host

DO {
  $TargetPathList = gci $TargetPath -directory -recurse -ErrorAction SilentlyContinue | Where { (gci $_.fullName -ErrorAction SilentlyContinue).count -eq 0 } | select -expandproperty FullName -ErrorAction SilentlyContinue
  $TargetPathList | Foreach-Object {
  	Write-Host "This empty Folder will be deleted: $_ "
  	Remove-Item $_ -Force -ErrorAction SilentlyContinue
	} #end DO
} while ($TargetPathList.count -gt 0)

Remove-Variable -Name TargetPath     -Force -ErrorAction SilentlyContinue
Remove-Variable -Name TargetPathList -Force -ErrorAction SilentlyContinue