Remove unneeded versionadded directives

Author: javiereguiluz

http_client.rst

@@ -1783,11 +1783,6 @@ assertions on the request before returning the mocked response::
 
     // ...
 
-.. versionadded:: 5.1
-
-    Passing a list of callbacks to the ``MockHttpClient`` was introduced
-    in Symfony 5.1.
-
 .. tip::
 
     Instead of using the first argument, you can also set the (list of)

reference/constraints/Cascade.rst

@@ -1,11 +1,6 @@
 Cascade
 =======
 
-.. versionadded:: 5.2
-
-    The :class:`Symfony\\Component\\Validator\\Constraints\\Cascade` was
-    introduced in Symfony 5.2 and requires PHP 7.4.
-
 The Cascade constraint is used to validate a whole class, including all the
 objects that might be stored in its properties. Thanks to this constraint,
 you don't need to add the :doc:`/reference/constraints/Valid` constraint on
@@ -27,32 +22,6 @@ constraints that are set in the child classes ``BookMetadata`` and
 
 .. configuration-block::
 
-    .. code-block:: php-annotations
-
-        // src/Model/BookCollection.php
-        namespace App\Model;
-
-        use App\Model\Author;
-        use App\Model\BookMetadata;
-        use Symfony\Component\Validator\Constraints as Assert;
-
-        /**
-         * @Assert\Cascade
-         */
-        class BookCollection
-        {
-            /**
-             * @Assert\NotBlank
-             */
-            protected $name = '';
-
-            public BookMetadata $metadata;
-
-            public Author $author;
-
-            // ...
-        }
-
     .. code-block:: php-attributes
 
         // src/Model/BookCollection.php