minor #7558 remove 2.x versionadded directives (xabbuh)

This PR was merged into the 3.2 branch.

Discussion
----------

remove 2.x versionadded directives

Commits
-------

5cf98d9 remove 2.x versionadded directives

Author: xabbuh

components/http_foundation/trusting_proxies.rst

@@ -27,10 +27,6 @@ your proxy as follows:
     // front controller) to only trust proxy headers coming from these IP addresses
     Request::setTrustedProxies(array('192.0.0.1', '10.0.0.0/8'));
 
-.. versionadded:: 2.3
-    CIDR notation support was introduced in Symfony 2.3, so you can whitelist whole
-    subnets (e.g. ``10.0.0.0/8``, ``fc00::/7``).
-
 You should also make sure that your proxy filters unauthorized use of these
 headers, e.g. if a proxy natively uses the ``X-Forwarded-For`` header, it
 should not allow clients to send ``Forwarded`` headers to Symfony.

controller.rst

@@ -180,10 +180,6 @@ and ``redirect()`` methods::
         return $this->redirect('http://symfony.com/doc');
     }
 
-.. versionadded:: 2.6
-    The ``redirectToRoute()`` method was introduced in Symfony 2.6. Previously (and still now), you
-    could use ``redirect()`` and ``generateUrl()`` together for this.
-
 For more information, see the :doc:`Routing article </routing>`.
 
 .. caution::

reference/configuration/framework.rst

@@ -1452,9 +1452,6 @@ name_converter
 
 **type**: ``string``
 
-.. versionadded:: 2.8
-    The ``name_converter`` option was introduced in Symfony 2.8.
-
 The name converter to use.
 The :class:`Symfony\\Component\\Serializer\\NameConverter\\CamelCaseToSnakeCaseNameConverter`
 name converter can enabled by using the ``serializer.name_converter.camel_case_to_snake_case``

serializer.rst

@@ -223,9 +223,6 @@ A service leveraging `APCu`_ (and APC for PHP < 5.5) is built-in.
 Enabling a Name Converter
 -------------------------
 
-.. versionadded:: 2.8
-    The ``name_converter`` option was introduced in Symfony 2.8.
-
 The use of a :ref:`name converter <component-serializer-converting-property-names-when-serializing-and-deserializing>`
 service can be defined in the configuration using the :ref:`name_converter <reference-serializer-name_converter>`
 option.