diff --git a/src/Symfony/Component/ErrorRenderer/Resources/stubs/Exception/FlattenException.php b/src/Symfony/Component/ErrorRenderer/Resources/stubs/Exception/FlattenException.php
deleted file mode 100644
index f17f5711a37c6..0000000000000
--- a/src/Symfony/Component/ErrorRenderer/Resources/stubs/Exception/FlattenException.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\Debug\Exception;
-
-if (!class_exists(FlattenException::class, false)) {
-    class_alias(\Symfony\Component\ErrorRenderer\Exception\FlattenException::class, FlattenException::class);
-}
-
-if (false) {
-    /**
-     * @deprecated since Symfony 4.4, use Symfony\Component\ErrorRenderer\Exception\FlattenException instead.
-     */
-    class FlattenException extends \Symfony\Component\ErrorRenderer\Exception\FlattenException
-    {
-    }
-}
diff --git a/src/Symfony/Component/ErrorRenderer/composer.json b/src/Symfony/Component/ErrorRenderer/composer.json
index 47a51e8a7a618..6966dbe72ae2a 100644
--- a/src/Symfony/Component/ErrorRenderer/composer.json
+++ b/src/Symfony/Component/ErrorRenderer/composer.json
@@ -33,7 +33,6 @@
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\ErrorRenderer\\": "" },
-        "classmap": [ "Resources/stubs/Exception/FlattenException.php" ],
         "exclude-from-classmap": [
             "/Tests/"
         ]
diff --git a/src/Symfony/Component/HttpKernel/CHANGELOG.md b/src/Symfony/Component/HttpKernel/CHANGELOG.md
index 5a38841153b6b..d8646e6ae749e 100644
--- a/src/Symfony/Component/HttpKernel/CHANGELOG.md
+++ b/src/Symfony/Component/HttpKernel/CHANGELOG.md
@@ -27,6 +27,7 @@ CHANGELOG
  * removed the second and third argument of `FileLocator::__construct`
  * removed loading resources from `%kernel.root_dir%/Resources` and `%kernel.root_dir%` as
    fallback directories.
+ * removed `exception` attribute passed to the configured controller of the `ExceptionListener`
 
 4.4.0
 -----
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
index 2d7e33298690f..b52ca664bf58c 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
@@ -12,7 +12,6 @@
 namespace Symfony\Component\HttpKernel\EventListener;
 
 use Psr\Log\LoggerInterface;
-use Symfony\Component\Debug\Exception\FlattenException as LegacyFlattenException;
 use Symfony\Component\ErrorRenderer\Exception\FlattenException;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
@@ -115,21 +114,9 @@ protected function logException(\Exception $exception, string $message)
      */
     protected function duplicateRequest(\Exception $exception, Request $request): Request
     {
-        @trigger_error(sprintf('Passing the "exception" attribute (instance of "%s") to the configured controller of the "%s" class is deprecated since Symfony 4.4, use the passed "e" attribute (instance of "%s") instead.', LegacyFlattenException::class, self::class, FlattenException::class));
-
-        $flattenException = FlattenException::createFromThrowable($exception);
-
-        // BC layer to be removed in 5.0
-        if (class_exists(\Symfony\Component\Debug\Debug::class, false)) {
-            $legacyFlattenException = LegacyFlattenException::createFromThrowable($exception);
-        } else {
-            $legacyFlattenException = $flattenException;
-        }
-
         $attributes = [
             '_controller' => $this->controller,
-            'exception' => $legacyFlattenException, // to be removed in 5.0
-            'e' => $flattenException,
+            'e' => FlattenException::createFromThrowable($exception),
             'logger' => $this->logger instanceof DebugLoggerInterface ? $this->logger : null,
         ];
         $request = $request->duplicate(null, null, $attributes);

<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head>
<title>pFad - Phonifier reborn</title>
<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
</head>
<body>
<h1>Pfad - The Proxy pFad of &#169; 2024 Garber Painting. All rights reserved.</h1>


<!-- Disclaimer -->
<p>Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.</p>
<br>
<p>Alternative Proxies:</p><p><a href="http://rainy.clevelandohioweatherforecast.com/php-proxy/index.php?q=https://patch-diff.githubusercontent.com/raw/symfony/symfony/pull/33983.diff" target="_blank">Alternative Proxy</a></p><p><a href="http://rainy.clevelandohioweatherforecast.com/pFad/index.php?u=https://patch-diff.githubusercontent.com/raw/symfony/symfony/pull/33983.diff" target="_blank">pFad Proxy</a></p><p><a href="http://rainy.clevelandohioweatherforecast.com/pFad/v3index.php?u=https://patch-diff.githubusercontent.com/raw/symfony/symfony/pull/33983.diff" target="_blank">pFad v3 Proxy</a></p><p><a href="http://rainy.clevelandohioweatherforecast.com/pFad/v4index.php?u=https://patch-diff.githubusercontent.com/raw/symfony/symfony/pull/33983.diff" target="_blank">pFad v4 Proxy</a></p></body>
</html>