Delete Duplicates In SharePoint List

I have a list which has tens of thousands of records and I need them to be unique.  I found a PowerShell script online that will work if I only have 1 unique column.  However, I have to group by 2 columns and I can't figure out how to make it work.

cls
if((Get-PSSnapin | Where {$_.Name -eq "Microsoft.SharePoint.PowerShell"}) -eq $null) {
     Add-PSSnapin Microsoft.SharePoint.PowerShell;
}

$ListName = "DuplicateTest"

$web = Get-SPWeb -identity "http://MyVM/sites/TestSite"
$list = $web.Lists[$ListName]

$AllDuplicates = $list.Items.GetDataTable() | Group-Object Title | where {$_.count -gt 1}
$count = 1
$max = $AllDuplicates.Count
foreach($duplicate in $AllDuplicates) 
{ 
	$duplicate.group | Select-Object -Skip 1 | % {$list.Items.DeleteItemById($_.ID)} 
	Write-Progress -PercentComplete ($count / $max * 100) -Activity "$count duplicates removed" -Status "In Progress" 
	$count++ 
} 

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To clarify, if I have this data in a SP list, only if both columns are duplicates should the items be removed.
Title     Carrier
1          Carrier1
1          Carrier1
12        Carrier1
12        Carrier2
100      Carrier1
100      Carrier1
100      Carrier2
LVL 9
skipper68Application Development ManagerAsked:
Who is Participating?
 
Justin SmithSr. System EngineerCommented:
Group-Object title,carrier


Obviously test first.
0
 
skipper68Application Development ManagerAuthor Commented:
Simple but effective and works perfectly.  Thanks ACH1LLES!
0
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