Merge pull request #212 from sh41/patch-1

Change confusing reference to removed service definition.

Author: soyuka

core/fosuser-bundle.md

@@ -10,7 +10,7 @@ You need to use serialization groups to hide some properties like `plainPassword
 shown are handled with the [`normalization_context`](serialization-groups-and-relations.md#normalization), while the properties
 you can modify are handled with [`denormalization_context`](serialization-groups-and-relations.md#denormalization).
 
-First register the following service:
+Create your User entity with serialization groups:
 
 ```php
 <?php