Remove old versionadded directives

Author: OskarStark

components/http_client.rst

@@ -389,10 +389,6 @@ Responses can be canceled at any moment before they are completed using the
         $response->cancel();
     }
 
-.. versionadded:: 4.4
-
-    The ``cancel()`` method was introduced in Symfony 4.4.
-
 Dealing with Network Timeouts
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

components/phpunit_bridge.rst

@@ -295,10 +295,6 @@ class autoloading time. This can be disabled with the ``debug-class-loader`` opt
         </listener>
     </listeners>
 
-.. versionadded:: 4.2
-
-    The ``DebugClassLoader`` integration was introduced in Symfony 4.2.
-
 Write Assertions about Deprecations
 -----------------------------------
 

doctrine.rst

@@ -485,10 +485,6 @@ doesn't replace the validation configuration entirely. You still need to add
 some :doc:`validation constraints </reference/constraints>` to ensure that data
 provided by the user is correct.
 
-.. versionadded:: 4.3
-
-    The automatic validation has been added in Symfony 4.3.
-
 Fetching Objects from the Database
 ----------------------------------
 

mailer.rst

@@ -1,10 +1,6 @@
 Sending Emails with Mailer
 ==========================
 
-.. versionadded:: 4.3
-    The Mailer component was added in Symfony 4.3 and is currently experimental.
-    The previous solution - Swift Mailer - is still valid: :doc:`Swift Mailer</email>`.
-
 Installation
 ------------
 

translation.rst

@@ -216,12 +216,6 @@ To manage these situations, Symfony follows the `ICU MessageFormat`_ syntax by
 using PHP's :phpclass:`MessageFormatter` class. Read more about this in
 :doc:`/translation/message_format`.
 
-.. versionadded:: 4.2
-
-   Support for ICU MessageFormat was introduced in Symfony 4.2. Prior to this,
-   pluralization was managed by the
-   :method:`Symfony\\Component\\Translation\\Translator::transChoice` method.
-
 Translations in Templates
 -------------------------