minor #20545 [Messenger] remove outdated timezone warning (xabbuh)

This PR was merged into the 6.4 branch.

Discussion
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[Messenger] remove outdated timezone warning

this was changed in symfony/symfony#50287

fixes symfony/symfony#59405

Commits
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5e338ab remove outdated timezone warning

Author: javiereguiluz

messenger.rst

@@ -1583,12 +1583,6 @@ DSN by using the ``table_name`` option:
 Or, to create the table yourself, set the ``auto_setup`` option to ``false`` and
 :ref:`generate a migration <doctrine-creating-the-database-tables-schema>`.
 
-.. warning::
-
-    The datetime property of the messages stored in the database uses the
-    timezone of the current system. This may cause issues if multiple machines
-    with different timezone configuration use the same storage.
-
 The transport has a number of options:
 
 ``table_name`` (default: ``messenger_messages``)