Retire Xamarin.Essentials API docs (#2136)

* Retire Xamarin.Essentials API docs.

* Edit.

.openpublishing.publish.config.json

@@ -7,7 +7,7 @@
       "locale": "en-us",
       "monikers": [],
       "moniker_ranges": [],
-      "open_to_public_contributors": true,
+      "open_to_public_contributors": false,
       "type_mapping": {
         "Conceptual": "Content",
         "ManagedReference": "Content",
@@ -85,4 +85,4 @@
   "docs_build_engine": {
     "name": "docfx_v3"
   }
-}
+}

docs/en/docfx.json

@@ -49,15 +49,11 @@
       "searchScope": ["Xamarin"],
       "uhfHeaderId": "MSDocsHeader-DotNet",
       "ms.topic": "managed-reference",
-      "feedback_system": "OpenSource",
-      "feedback_github_repo": "xamarin/Essentials",
-      "feedback_product_url": "https://developercommunity.visualstudio.com/",
-      "open_source_feedback_contributorGuideUrl": "https://github.com/MicrosoftDocs/xamarin-docs/blob/live/CONTRIBUTING.md",
-      "open_source_feedback_issueUrl": "https://github.com/xamarin/Essentials/issues/new?template=customer-feedback.yml",
-      "open_source_feedback_productName": "Xamarin.Essentials",
-      "open_source_feedback_issueTitle": "",
-      "open_source_feedback_productLogoLightUrl": "https://learn.microsoft.com/media/logos/logo_xamarin.svg",
-      "open_source_feedback_productLogoDarkUrl": "https://learn.microsoft.com/media/logos/logo_xamarin.svg",
+      "ROBOTS": "NOINDEX,NOFOLLOW",
+      "is_archived": true,      
+      "is_retired": true,
+      "feedback_system": "None",
+      "learn_archive": "manual"
     },
     "fileMetadata": {
       "author": {