docs(config): remove invalid hint

- vehicle_type has a default value of `hgv`

docs/api-reference/endpoints/directions/routing-options.md

@@ -73,7 +73,7 @@ The value is an object that can have the following properties:
 
 An object specifying restrictions for `cycling-*`, `driving-hgv` or `wheelchair`profiles.
 
-* for **`driving-hgv`**: *(You have to specify the [vehicle_type](#vehicle-type) in the options for these parameters!)*
+* for `driving-hgv`:
 
   | Parameter  | Type    | Description                                                                                                                       |
   |------------|---------|-----------------------------------------------------------------------------------------------------------------------------------|