Remove outdated reference to not-allowed cursor (#28188)

as this styling was removed back in https://github.com/twbs/bootstrap/commit/7056f702408a97f01cb32bc6075d88ec27cdcf52

site/docs/4.2/components/forms.md

@@ -174,7 +174,7 @@ Set horizontally scrollable range inputs using `.form-control-range`.
 
 Default checkboxes and radios are improved upon with the help of `.form-check`, **a single class for both input types that improves the layout and behavior of their HTML elements**. Checkboxes are for selecting one or several options in a list, while radios are for selecting one option from many.
 
-Disabled checkboxes and radios are supported, but to provide a `not-allowed` cursor on hover of the parent `<label>`, you'll need to add the `disabled` attribute to the `.form-check-input`. The disabled attribute will apply a lighter color to help indicate the input's state.
+Disabled checkboxes and radios are supported. The `disabled` attribute will apply a lighter color to help indicate the input's state.
 
 Checkboxes and radios use are built to support HTML-based form validation and provide concise, accessible labels. As such, our `<input>`s and `<label>`s are sibling elements as opposed to an `<input>` within a `<label>`. This is slightly more verbose as you must specify `id` and `for` attributes to relate the `<input>` and `<label>`.