Use stricter pyright settings for xmltodict (#14763)

Author: AlexWaygood

pyrightconfig.stricter.json

@@ -93,7 +93,6 @@
         "stubs/tqdm",
         "stubs/vobject",
         "stubs/workalendar",
-        "stubs/xmltodict",
     ],
     "typeCheckingMode": "strict",
     // TODO: Complete incomplete stubs