Remove custom example plugin. (#25784)

docs/4.0/components/breadcrumb.md

@@ -9,7 +9,7 @@ group: components
 
 Separators are automatically added in CSS through [`::before`](https://developer.mozilla.org/en-US/docs/Web/CSS/::before) and [`content`](https://developer.mozilla.org/en-US/docs/Web/CSS/content).
 
-{% example html %}
+{% capture example %}
 <nav aria-label="breadcrumb">
   <ol class="breadcrumb">
     <li class="breadcrumb-item active" aria-current="page">Home</li>
@@ -30,7 +30,8 @@ Separators are automatically added in CSS through [`::before`](https://developer
     <li class="breadcrumb-item active" aria-current="page">Data</li>
   </ol>
 </nav>
-{% endexample %}
+{% endcapture %}
+{% include example.html content=example %}
 
 ## Accessibility