remove useless tip

Author: Cimanel

docs/AutocompleteInput.md

@@ -51,8 +51,6 @@ The form value for the source must be the selected value, e.g.
 
 **Tip**: If you need to let users select more than one item in the list, check out the [`<AutocompleteArrayInput>`](./AutocompleteArrayInput.md) component.
 
-**Tip**: `<AutocompleteInput>` is a stateless component, so it only allows to *filter* the list of choices, not to *extend* it. If you need to populate the list of choices based on the result from a `fetch` call (and if [`<ReferenceInput>`](./ReferenceInput.md) doesn't cover your need), you'll have to [write your own Input component](./Inputs.md#writing-your-own-input-component) based on Material UI `<Autocomplete>` component.
-
 ## Props
 
 | Prop                       | Required | Type                  | Default                                                             | Description                                                                                                                                                                                                         |