Revert "Add Checksum validation for Premium download to detect corrupt downloads (#487)"

This reverts commit 5efdfc2.

Author: knithinc

Syndication/AzureStack.MarketplaceSyndication.psm1

@@ -503,7 +503,7 @@ function DownloadMarketplaceProduct {
     while (-not $completed) {
         try {
             if ($PremiumDownload) {
-                & 'C:\Program Files (x86)\Microsoft SDKs\Azure\AzCopy\AzCopy.exe' /Source:$Source /Dest:$tmpDestination /Y /CheckMD5
+                & 'C:\Program Files (x86)\Microsoft SDKs\Azure\AzCopy\AzCopy.exe' /Source:$Source /Dest:$tmpDestination /Y
             } else {
                 $wc = New-Object System.Net.WebClient
                 $wc.DownloadFile($Source, $tmpDestination)