remove msft package metadata (posit-dev/positron-python#428)

Author: isabelizimm

extensions/positron-python/package.json

@@ -1736,10 +1736,5 @@
     },
     "extensionDependencies": [
         "vscode.jupyter-adapter"
-    ],
-    "__metadata": {
-        "id": "f1f59ae4-9318-4f3c-a9b5-81b2eaa5f8a5",
-        "publisherDisplayName": "Posit Software, PBC",
-        "publisherId": "998b010b-e2af-44a5-a6cd-0b5fd3b9b6f8"
-    }
+    ]
 }