minor symfony#49717 [Scheduler] Remove unused variable in AddScheduleMessengerPass (onEXHovia)

This PR was merged into the 6.3 branch.

Discussion
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[Scheduler] Remove unused variable in AddScheduleMessengerPass

| Q             | A
| ------------- | ---
| Branch?       | 6.3
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | n/a
| License       | MIT
| Doc PR        | n/a

Commits
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09df772 [Scheduler] Remove unused variable in AddScheduleMessengerPass

Author: nicolas-grekas

src/Symfony/Component/Scheduler/DependencyInjection/AddScheduleMessengerPass.php

@@ -44,8 +44,7 @@ public function process(ContainerBuilder $container): void
                 ->setArguments(['schedule://'.$name, ['transport_name' => $transportName], new Reference('messenger.default_serializer')])
                 ->addTag('messenger.receiver', ['alias' => $transportName])
             ;
-            $container->setDefinition($transportId = 'messenger.transport.'.$transportName, $transportDefinition);
-            $senderAliases[$transportName] = $transportId;
+            $container->setDefinition('messenger.transport.'.$transportName, $transportDefinition);
         }
     }
 }