Remove some versionadded directives

Author: javiereguiluz

components/messenger.rst

@@ -167,11 +167,6 @@ Here are some important envelope stamps that are shipped with the Symfony Messen
   differentiate it from messages created "manually". You can learn more about it
   in the :doc:`Scheduler documentation </scheduler>`.
 
-.. versionadded:: 6.4
-
-    The :class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp` was
-    introduced in Symfony 6.4.
-
 .. note::
 
     The :class:`Symfony\\Component\\Messenger\\Stamp\\ErrorDetailsStamp` stamp

scheduler.rst

@@ -885,11 +885,6 @@ When using the ``RedispatchMessage``, Symfony will attach a
 :class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp` to the message,
 helping you identify those messages when needed.
 
-.. versionadded:: 6.4
-
-    Automatically attaching a :class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp`
-    to redispatched messages was introduced in Symfony 6.4.
-
 .. _`Memoizing`: https://en.wikipedia.org/wiki/Memoization
 .. _`cron command-line utility`: https://en.wikipedia.org/wiki/Cron
 .. _`crontab.guru website`: https://crontab.guru/