diff --git a/composer.json b/composer.json
index 941ceea72..9d02164e1 100644
--- a/composer.json
+++ b/composer.json
@@ -115,8 +115,6 @@
     },
     "autoload": {
         "psr-4": {
-            "Symfony\\Component\\DependencyInjection\\": "src/Symfony/Component/DependencyInjection",
-            "ChampsLibres\\WopiBundle\\": "src/ChampsLibres/WopiBundle",
             "Chill\\ActivityBundle\\": "src/Bundle/ChillActivityBundle",
             "Chill\\AsideActivityBundle\\": "src/Bundle/ChillAsideActivityBundle/src",
             "Chill\\BudgetBundle\\": "src/Bundle/ChillBudgetBundle",
diff --git a/src/ChampsLibres/WopiBundle/DependencyInjection/Configuration.php b/src/ChampsLibres/WopiBundle/DependencyInjection/Configuration.php
deleted file mode 100644
index 4f8d4c267..000000000
--- a/src/ChampsLibres/WopiBundle/DependencyInjection/Configuration.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-
-/**
- * For the full copyright and license information, please view
- * the LICENSE file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace ChampsLibres\WopiBundle\DependencyInjection;
-
-use Symfony\Component\Config\Definition\Builder\TreeBuilder;
-use Symfony\Component\Config\Definition\ConfigurationInterface;
-
-final class Configuration implements ConfigurationInterface
-{
-    public function getConfigTreeBuilder(): TreeBuilder
-    {
-        $treeBuilder = new TreeBuilder('wopi');
-
-        /** @var \Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition $rootNode */
-        $rootNode = $treeBuilder->getRootNode();
-
-        /** @phpstan-ignore-next-line */
-        $rootNode
-            ->children()
-            ->scalarNode('server')->end()
-            ->enumNode('version_management')->values(['version', 'timestamp'])
-            ->info('Manager document versioning through version (Office 365) or last modified time (Collabora Online, CODE, etc.)')
-            ->defaultValue('timestamp')
-            ->end()
-            ->booleanNode('enable_lock')->defaultTrue()->end()
-            ->end();
-
-        return $treeBuilder;
-    }
-}
diff --git a/src/Kernel.php b/src/Kernel.php
deleted file mode 100644
index 779cd1f2b..000000000
--- a/src/Kernel.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-namespace App;
-
-use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
-use Symfony\Component\HttpKernel\Kernel as BaseKernel;
-
-class Kernel extends BaseKernel
-{
-    use MicroKernelTrait;
-}
diff --git a/src/Symfony/Component/DependencyInjection/ContainerAwareTrait.php b/src/Symfony/Component/DependencyInjection/ContainerAwareTrait.php
deleted file mode 100644
index 397c19615..000000000
--- a/src/Symfony/Component/DependencyInjection/ContainerAwareTrait.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-namespace Symfony\Component\DependencyInjection;
-
-/**
- * ContainerAwareTrait implementation.
- *
- * This trait is a replacement for the original Symfony ContainerAwareTrait
- * which has been removed in newer Symfony versions.
- */
-trait ContainerAwareTrait
-{
-    /**
-     * @var ContainerInterface|null
-     */
-    protected $container;
-
-    /**
-     * Sets the container.
-     */
-    public function setContainer(ContainerInterface $container = null): void
-    {
-        $this->container = $container;
-    }
-}