Removed the reference to specific Symfony files

Author: javiereguiluz

_includes/_annotation_loader_tip.rst.inc

@@ -5,8 +5,8 @@
 
 .. tip::
 
-    Annotation classes aren't loaded automatically, so you must load them
-    like Symfony does in the ``app/autoload.php`` file::
+    Annotation classes aren't loaded automatically, so you must load them
+    using a class loader like this::
 
         use Composer\Autoload\ClassLoader;
         use Doctrine\Common\Annotations\AnnotationRegistry;