diff --git a/extension.neon b/extension.neon
index cae132d..7f0a079 100644
--- a/extension.neon
+++ b/extension.neon
@@ -1,9 +1,4 @@
 services:
-	-
-		class: JanGregor\Prophecy\PhpDoc\ObjectProphecy\TypeNodeResolverExtension
-		tags:
-			- phpstan.phpDoc.typeNodeResolverExtension
-
 	-
 		class: JanGregor\Prophecy\Reflection\ObjectProphecy\MethodsClassReflectionExtension
 		tags:
diff --git a/src/PhpDoc/ObjectProphecy/TypeNodeResolverExtension.php b/src/PhpDoc/ObjectProphecy/TypeNodeResolverExtension.php
deleted file mode 100644
index 47c1675..0000000
--- a/src/PhpDoc/ObjectProphecy/TypeNodeResolverExtension.php
+++ /dev/null
@@ -1,75 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/**
- * Copyright (c) 2018 Jan Gregor Emge-Triebel
- *
- * For the full copyright and license information, please view
- * the LICENSE.md file that was distributed with this source code.
- *
- * @see https://github.com/Jan0707/phpstan-prophecy
- */
-
-namespace JanGregor\Prophecy\PhpDoc\ObjectProphecy;
-
-use PHPStan\Analyser;
-use PHPStan\PhpDoc;
-use PHPStan\PhpDocParser;
-use PHPStan\Type;
-use Prophecy\Prophecy;
-
-/**
- * @internal
- */
-final class TypeNodeResolverExtension implements PhpDoc\TypeNodeResolverAwareExtension, PhpDoc\TypeNodeResolverExtension
-{
-    private PhpDoc\TypeNodeResolver $typeNodeResolver;
-
-    public function setTypeNodeResolver(PhpDoc\TypeNodeResolver $typeNodeResolver): void
-    {
-        $this->typeNodeResolver = $typeNodeResolver;
-    }
-
-    public function getCacheKey(): string
-    {
-        return 'prophecy-with-generics-v2';
-    }
-
-    public function resolve(PhpDocParser\Ast\Type\TypeNode $typeNode, Analyser\NameScope $nameScope): ?Type\Type
-    {
-        if (!$typeNode instanceof PhpDocParser\Ast\Type\UnionTypeNode) {
-            return null;
-        }
-
-        if (2 === \count($typeNode->types)) {
-            $objectProphecyType = null;
-            $prophesizedType = null;
-
-            foreach ($typeNode->types as $innerType) {
-                $type = $this->typeNodeResolver->resolve($innerType, $nameScope);
-
-                if ($type->isObject()->yes()) {
-                    if ((new Type\ObjectType(Prophecy\ObjectProphecy::class))->isSuperTypeOf($type)->yes()) {
-                        $objectProphecyType = $type;
-                    } else {
-                        $prophesizedType = $type;
-                    }
-                } else {
-                    break;
-                }
-            }
-
-            if (null !== $objectProphecyType && null !== $prophesizedType) {
-                return new Type\Generic\GenericObjectType(
-                    Prophecy\ObjectProphecy::class,
-                    [
-                        $prophesizedType,
-                    ],
-                );
-            }
-        }
-
-        return null;
-    }
-}