minor #13340 Remove caution section about bind scalar controller arguments (Ioni14)

This PR was merged into the 4.4 branch.

Discussion
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Remove caution section about bind scalar controller arguments

This caution section is no longer relevant since 4.1 with symfony/symfony@2c7198c .

Commits
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717547b Remove caution section about bind scalar controller arguments

Author: javiereguiluz

controller.rst

@@ -277,14 +277,6 @@ the argument by its name:
 Like with all services, you can also use regular :ref:`constructor injection <services-constructor-injection>`
 in your controllers.
 
-.. caution::
-
-    You can *only* pass *services* to your controller arguments in this way. It's not
-    possible, for example, to pass a config parameter as a controller argument,
-    even by using ``bind``. If you need a parameter, use the ``$this->getParameter('kernel.debug')``
-    shortcut or pass the value through your controller's ``__construct()`` method
-    and specify its value with ``bind``.
-
 For more information about services, see the :doc:`/service_container` article.
 
 Generating Controllers