Remove 2.x versionadded directives

Author: wouterj

components/phpunit_bridge.rst

@@ -121,9 +121,6 @@ compatibility reasons.
 Time-sensitive Tests
 ---------------------
 
-.. versionadded:: 2.8
-    Support for clock mocking was introduced in Symfony 2.8.
-
 Use Case
 ~~~~~~~~
 

reference/forms/types/entity.rst

@@ -205,9 +205,6 @@ return a ``QueryBuilder``.
 If you'd like to display an empty list of entries, you can return ``null`` in
 the Closure.
 
-.. versionadded:: 2.8
-    Returning ``null`` in the Closure was introduced in Symfony 2.8.
-
 Overridden Options
 ------------------
 

reference/twig_reference.rst

@@ -345,9 +345,6 @@ information in :ref:`book-templating-pages`.
 absolute_url
 ~~~~~~~~~~~~
 
-.. versionadded:: 2.7
-    The ``absolute_url()`` function was introduced in Symfony 2.7.
-
 .. code-block:: jinja
 
     {{ absolute_url(path) }}
@@ -370,9 +367,6 @@ you're on the following page in your app:
 relative_path
 ~~~~~~~~~~~~~
 
-.. versionadded:: 2.7
-    The ``relative_path()`` function was introduced in Symfony 2.7.
-
 .. code-block:: jinja
 
     {{ relative_path(path) }}