Windows: clean up temporary perl install

Followup to containers#21991. Strawberry Perl is now installed by default
in CI VMs[1], so we no longer need the temporary install-perl code.

 [1] containers/automation_images#337

Signed-off-by: Ed Santiago <santiago@redhat.com>

contrib/cirrus/win-lib.ps1

@@ -40,22 +40,11 @@ if ($Env:CI -eq "true") {
     Remove-Item Env:\CIRRUS_PR_BODY -ErrorAction:Ignore
 }
 
-function Install-Perl-If-Required {
-    if (-not (Get-Command perl -ErrorAction SilentlyContinue)) {
-        Write-Host "`nInstalling Perl as it is required to use logformatter"
-        choco install --no-progress --confirm --acceptlicense --nocolor StrawberryPerl
-        Write-Host "`nAdd perl to the PATH"
-        Set-Item "Env:PATH" "$Env:PATH;C:\Strawberry\perl\bin"
-    }
-}
-
 function Invoke-Logformatter {
     param (
         [Collections.ArrayList] $unformattedLog
     )
 
-    Install-Perl-If-Required
-
     Write-Host "Invoking Logformatter"
     $logFormatterInput = @('/define.gitCommit=' + $(git rev-parse HEAD)) + $unformattedLog
     $logformatterPath = "$PSScriptRoot\logformatter"