Removed Studio App Center article

Article Visual Studio App Center has been removed as the benefit retired in March of 2025. A redirect URL has been added to the json directory.

Author: JoseB-RDC

.openpublishing.redirection.subscriptions.json

@@ -29,6 +29,10 @@
            "source_path": "subscriptions/handle-expired-license.md",
             "redirect_url": "/visualstudio/subscriptions",
             "redirect_document_id": false 
+        },
+        {   "source_path": "subscriptions/vs-visual-studio-app-center.md",
+            "redirect_url": "/visualstudio/subscriptions",
+            "redirect_document_id": false
         }
     ]
 }