[#10480] reuse wording from multi kernel article

Author: xabbuh

configuration/micro_kernel_trait.rst

@@ -126,13 +126,7 @@ your ``composer.json`` file to load from there:
         }
     }
 
-Before going any further, you need to regenerate the autoload files! Your changes in the "autoload"
-section of the ``composer.json`` file will not be in effect until you run the following command:
-
-.. code-block:: bash
-
-    $ composer dump-autoload
-    
+Then, run ``composer dump-autoload`` to dump your new autoload config.
 
 Now, suppose you want to use Twig and load routes via annotations. Instead of
 putting *everything* in ``index.php``, create a new ``app/AppKernel.php`` to