Fix: incorrect type hint on CustomData class (#686)

Summary:
Removed an additional type hint that was causing 'self' to be incorrectly typed as a float. This fix ensures that 'self' is properly typed and the method behaves as expected.

Pull Request resolved: #686

Reviewed By: liliarizona

Differential Revision: D67467927

Pulled By: stcheng

fbshipit-source-id: 742e8f8d717de894b364499dcd2ef1b9a2bb5038

facebook_business/adobjects/serverside/custom_data.py

@@ -65,7 +65,7 @@ def __init__(
         item_number=None,
         custom_properties={},
     ):
-        # type: (float, str, str, str, content_ids, List[str], List[Content], str, str, float, int, str, str, DeliveryCategory ,str, dict) -> None
+        # type: (float, str, str, str, List[str], List[Content], str, str, float, int, str, str, DeliveryCategory ,str, dict) -> None
 
         self._value = None
         self._currency = None