Delete Folder instead Files

[zero1de]

My script goes through folders and subfolders but deletes the files instead of folders.
I want to delete if i have in Folder \\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130101 6 Folder like this
\\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130102
\\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130103
\\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130104
\\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130105
\\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130106
\\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130107

Delete Folder \\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130106 and \\xxx\dfs\XML-Archiv\sss\pu_207\archiv\20130107
The Script should start at \\xxx\dfs\XML-Archiv\sss the next Subfolder pu_207 oder pu_208 etc. can't delete !!!

Who can help me adapt the script.

path = "\\xxx\DFS\XML-Archiv\sss\"
$keep = 5
$strLogFileName = "\\xxx\DFS\XML-Archiv\sss\Deleted_DWHXML.log";

function Log-Message
{
Param ([string]$logtext)
Add-content $strLogFileName -value $logtext
}

$dirs = Get-ChildItem -Path $path -Recurse | Where-Object {$_.PsIsContainer}
foreach ($dir in $dirs) {
$files = Get-ChildItem -Path $dir.FullName | Where-Object {-not $_.PsIsContainer -and $_.name -like "*.zip"}
if ($files.Count -gt $keep) {
$files | Sort-Object LastWriteTime | Select-Object -First ($files.Count - $keep) |
% { $dt=get-date;(Log-Message "Deleting File $_ on $dt");$_ }| Remove-Item -Force

}
}