Update modal.md

Removed a duplicate explanation.

docs/4.0/components/modal.md

@@ -15,11 +15,6 @@ Before getting started with Bootstrap's modal component, be sure to read the fol
 - Bootstrap only supports one modal window at a time. Nested modals aren't supported as we believe them to be poor user experiences.
 - Modals use `position: fixed`, which can sometimes be a bit particular about its rendering. Whenever possible, place your modal HTML in a top-level position to avoid potential interference from other elements. You'll likely run into issues when nesting a `.modal` within another fixed element.
 - Once again, due to `position: fixed`, there are some caveats with using modals on mobile devices. [See our browser support docs]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/browsers-devices/#modals-and-dropdowns-on-mobile) for details.
-- Lastly, the `autofocus` HTML attribute has no effect in modals. Here's how you can achieve the same effect with custom JavaScript.
-
-Keep reading for demos and usage guidelines.
-
-
 - Due to how HTML5 defines its semantics, [the `autofocus` HTML attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-autofocus) has no effect in Bootstrap modals. To achieve the same effect, use some custom JavaScript:
 
 {% highlight js %}
@@ -28,6 +23,8 @@ $('#myModal').on('shown.bs.modal', function () {
 })
 {% endhighlight %}
 
+Keep reading for demos and usage guidelines.
+
 ## Examples
 
 ### Modal components