$AppRegistrationId = "<App Registration>"
$SiteURL = "<Site URL>"
Connect-PnPOnline -Url $SiteURL -Interactive -ClientId $AppRegistrationId

$InactiveFilesForDeletion = Import-CSV -Path '<Inactive File Report Path>'

ForEach($InactiveFile in $InactiveFilesForDeletion){

    Remove-PnPFile -ServerRelativeUrl $InactiveFile.DocURL -Recycle:$false -Force
}