Sync eng/common directory with azure-sdk-tools for PR 2939 (#3468)

* Remove extra files

* Update common.ps1

* Update Update-DocsMsToc.ps1

Co-authored-by: sima-zhu <sizhu@microsoft.com>
Co-authored-by: Sima Zhu <48036328+sima-zhu@users.noreply.github.com>

eng/common/scripts/Update-DocsMsToc.ps1

@@ -102,11 +102,16 @@ $onboardedPackages = &$GetOnboardedDocsMsPackagesFn `
 # because we need to generate ToCs for packages which are not necessarily "New"
 # in the metadata AND onboard legacy packages (which `Update-DocsMsPackages.ps1`
 # does not do)
-$metadata = (Get-CSVMetadata).Where({
-    $_.Package `
-      -and $onboardedPackages.ContainsKey($_.Package) `
-      -and $_.Hide -ne 'true' 
-  })
+$fullMetadata = Get-CSVMetadata
+$metadata = @()
+foreach($metadataEntry in $fullMetadata) {
+  if ($metadataEntry.Package -and $metadataEntry.Hide -ne 'true') {
+    $pkgKey = GetPackageKey $metadataEntry
+    if($onboardedPackages.ContainsKey($pkgKey)) {
+      $metadata += $metadataEntry
+    }
+  }
+}
 
 $fileMetadata = @()
 foreach ($metadataFile in Get-ChildItem "$DocRepoLocation/metadata/*/*.json" -Recurse) {