minor #17936 [Messenger] Remove versionadded about 5.4 (MrYamous)

This PR was merged into the 6.2 branch.

Discussion
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[Messenger] Remove versionadded about 5.4

Small change to make gh action green again :)

Commits
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537f91d [Messenger] Remove versionadded about 5.4

Author: OskarStark

messenger.rst

@@ -2188,12 +2188,6 @@ provided in order to ease the declaration of these special handlers::
     By default, pending batches are flushed when the worker is idle as well
     as when it is stopped.
 
-.. versionadded:: 5.4
-
-    :class:`Symfony\\Component\\Messenger\\Handler\\BatchHandlerInterface` and
-    :class:`Symfony\\Component\\Messenger\\Handler\\BatchHandlerTrait` were
-    introduced in Symfony 5.4.
-
 Extending Messenger
 -------------------