Remove btn-xs from dropdown docs

Created by: zacechola

Refs #17029 (closed)

docs/components/button-dropdown.md

@@ -235,20 +235,6 @@ Button dropdowns work with buttons of all sizes.
       </div>
     </div><!-- /btn-group -->
   </div><!-- /btn-toolbar -->
-  <div class="btn-toolbar" role="toolbar">
-    <div class="btn-group">
-      <button class="btn btn-secondary btn-xs dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
-        Extra small button
-      </button>
-      <div class="dropdown-menu">
-        <a class="dropdown-item" href="#">Action</a>
-        <a class="dropdown-item" href="#">Another action</a>
-        <a class="dropdown-item" href="#">Something else here</a>
-        <div class="dropdown-divider"></div>
-        <a class="dropdown-item" href="#">Separated link</a>
-      </div>
-    </div><!-- /btn-group -->
-  </div><!-- /btn-toolbar -->
 </div><!-- /example -->
 
 {% highlight html %}
@@ -271,16 +257,6 @@ Button dropdowns work with buttons of all sizes.
     ...
   </div>
 </div>
-
-<!-- Extra small button group -->
-<div class="btn-group">
-  <button class="btn btn-secondary btn-xs dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
-    Extra small button
-  </button>
-  <div class="dropdown-menu">
-    ...
-  </div>
-</div>
 {% endhighlight %}
 
 ### Dropup variation