Revert "Merge pull request FriendsOfSymfony#2691 from runawaycoin/patch-2"

This reverts commit 5884948, reversing
changes made to 45314d5.

The form factory service has no reason to be a public service. It is used
only by the controller and we don't use public access in it anymore.

Author: stof

Resources/config/registration.xml

@@ -6,7 +6,7 @@
 
     <services>
 
-        <service id="fos_user.registration.form.factory" class="FOS\UserBundle\Form\Factory\FormFactory" public="true">
+        <service id="fos_user.registration.form.factory" class="FOS\UserBundle\Form\Factory\FormFactory">
             <argument type="service" id="form.factory" />
             <argument>%fos_user.registration.form.name%</argument>
             <argument>%fos_user.registration.form.type%</argument>