diff --git a/core/core.services.yml b/core/core.services.yml
index b093d4bfac..89af8d5193 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -740,16 +740,13 @@ services:
     arguments: ['@event_dispatcher', '@controller_resolver', '@request_stack', '@http_kernel.controller.argument_resolver']
   http_kernel.controller.argument_resolver:
     class: Symfony\Component\HttpKernel\Controller\ArgumentResolver
-    arguments: ['@http_kernel.controller.argument_metadata_factory', ['@argument_resolver.request_attribute', '@argument_resolver.raw_parameter', '@argument_resolver.request', '@argument_resolver.psr7_request', '@argument_resolver.route_match', '@argument_resolver.default']]
+    arguments: ['@http_kernel.controller.argument_metadata_factory', ['@argument_resolver.request_attribute', '@argument_resolver.request', '@argument_resolver.psr7_request', '@argument_resolver.route_match', '@argument_resolver.default']]
   http_kernel.controller.argument_metadata_factory:
     class: Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadataFactory
     public: false
   argument_resolver.request_attribute:
     class: Symfony\Component\HttpKernel\Controller\ArgumentResolver\RequestAttributeValueResolver
     public: false
-  argument_resolver.raw_parameter:
-    class: Drupal\Core\Controller\ArgumentResolver\RawParameterValueResolver
-    public: false
   argument_resolver.request:
     class: Symfony\Component\HttpKernel\Controller\ArgumentResolver\RequestValueResolver
     public: false
diff --git a/core/lib/Drupal/Core/Controller/ArgumentResolver/RawParameterValueResolver.php b/core/lib/Drupal/Core/Controller/ArgumentResolver/RawParameterValueResolver.php
deleted file mode 100644
index 7e2a35a470..0000000000
--- a/core/lib/Drupal/Core/Controller/ArgumentResolver/RawParameterValueResolver.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-namespace Drupal\Core\Controller\ArgumentResolver;
-
-use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
-use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
-
-/**
- * Yields an argument's value from the request's _raw_variables attribute.
- */
-final class RawParameterValueResolver implements ArgumentValueResolverInterface {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function supports(Request $request, ArgumentMetadata $argument) {
-    return !$argument->isVariadic() && $request->attributes->has('_raw_variables') && array_key_exists($argument->getName(), $request->attributes->get('_raw_variables'));
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function resolve(Request $request, ArgumentMetadata $argument) {
-    yield $request->attributes->get('_raw_variables')[$argument->getName()];
-  }
-
-}
diff --git a/core/lib/Drupal/Core/Controller/ControllerResolver.php b/core/lib/Drupal/Core/Controller/ControllerResolver.php
index 6c887b5a59..20df5e8efb 100644
--- a/core/lib/Drupal/Core/Controller/ControllerResolver.php
+++ b/core/lib/Drupal/Core/Controller/ControllerResolver.php
@@ -131,15 +131,11 @@ protected function doGetArguments(Request $request, $controller, array $paramete
     // to ensure it is removed in Drupal 9.
     @trigger_error(sprintf('%s is deprecated as of 8.6.0 and will be removed in 9.0. Inject the "http_kernel.controller.argument_resolver" service instead.', __METHOD__, ArgumentResolverInterface::class), E_USER_DEPRECATED);
     $attributes = $request->attributes->all();
-    $raw_parameters = $request->attributes->has('_raw_variables') ? $request->attributes->get('_raw_variables') : [];
     $arguments = [];
     foreach ($parameters as $param) {
       if (array_key_exists($param->name, $attributes)) {
         $arguments[] = $attributes[$param->name];
       }
-      elseif (array_key_exists($param->name, $raw_parameters)) {
-        $arguments[] = $attributes[$param->name];
-      }
       elseif ($param->getClass() && $param->getClass()->isInstance($request)) {
         $arguments[] = $request;
       }