Improve SimpleFormIteratorBase documentation

Author: djhi

docs_headless/src/content/docs/SimpleFormIteratorBase.md

@@ -67,5 +67,4 @@ const AddItemButton = () => {
 
 | Prop              | Required | Type           | Default               | Description                                   |
 |-------------------|----------|----------------|-----------------------|-----------------------------------------------|
-| `children`        | Optional | `ReactElement` | -                     | List of inputs to display for each array item |
-| `getItemDefaults` | Optional | `Function`     | -                     | Get the default values for new items          |
+| `children`        | Optional | `ReactElement` | -                     | List of inputs to display for each array item |