Question Suppression Agent SCCM sur X machines

$computers = 'computer1','computer2'
#Credential
$username = 'Dom\username'
$password = 'password'
$secstr = New-Object -TypeName System.Security.SecureString
$password.ToCharArray() | ForEach-Object {$secstr.AppendChar($_)}
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $secstr

foreach ($serv in $computers) {
if (test-Connection -ComputerName $($Serv) -Count 2 -Quiet){
$session = New-PSSession -ComputerName $serv -Credential $cred 
Invoke-Command -Session $session -ArgumentList $serv,$cred,$session -ScriptBlock { param([Parameter(Mandatory=$true)][Object]$serv,[Parameter(Mandatory=$true)][Object]$cred,[Parameter(Mandatory=$true)][Object]$session)
Set-Location -Path 'C:\Windows\ccmsetup\'
.\ccmsetup.exe /uninstall
start-sleep -Seconds 10

Get-WmiObject -query "Select * From __Namespace Where Name='CCM'" -Namespace 'root' | Remove-WmiObject}
Else {write-Warning -Message "Machine $Serv injoignable (Ping KO)"} }
Remove-PSsession -Session $session
 }