minor #12369 remove unused use statements (xabbuh)

This PR was merged into the 4.4 branch.

Discussion
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remove unused use statements

Commits
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5f0201b remove unused use statements

Author: xabbuh

logging/handlers.rst

@@ -50,8 +50,6 @@ To use it, declare it as a service:
     .. code-block:: php
 
         // config/services.php
-        use App\Logger\SessionRequestProcessor;
-        use Monolog\Formatter\LineFormatter;
         use Symfony\Bridge\Monolog\Handler\ElasticsearchLogstashHandler;
 
         $container->register(ElasticsearchLogstashHandler::class);