[no ci] remove dead link

Author: slax57

docs_headless/src/content/docs/ArrayInputBase.md

@@ -174,4 +174,4 @@ const UserArray = () => (
 );
 ```
 
-**Tip:** If you only need the item's index, you can leverage the [`useSimpleFormIteratorItem` hook](./SimpleFormIterator.md#getting-the-element-index) instead.
+**Tip:** If you only need the item's index, you can leverage the `useSimpleFormIteratorItem` hook instead.