diff --git a/src/Autoload/Requirements.php b/src/Autoload/Requirements.php
deleted file mode 100644
index af8724df..00000000
--- a/src/Autoload/Requirements.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php
-
-/*
- * This file is part of the humbug/php-scoper package.
- *
- * Copyright (c) 2017 Théo FIDRY <theo.fidry@gmail.com>,
- *                    Pádraic Brady <padraic.brady@gmail.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Humbug\PhpScoper\Autoload;
-
-use Composer\Semver\Semver;
-use Symfony\Requirements\RequirementCollection;
-
-/**
- * Collect the list of requirements for running the project. Code in this file must be PHP 5.3+ compatible as is used
- * to know if PHP-Scoper can be run or not.
- */
-final class Requirements extends RequirementCollection
-{
-    public function __construct($composerJson)
-    {
-        $composerConfig = $this->readComposer($composerJson);
-
-        $this->addPhpVersionRequirement($composerConfig);
-        $this->addExtensionRequirements($composerConfig);
-    }
-
-    private function readComposer($composerJson)
-    {
-        $composer = json_decode(file_get_contents($composerJson), true);
-
-        return $composer['require'];
-    }
-
-    private function addPhpVersionRequirement(array $composerConfig)
-    {
-        $installedPhpVersion = phpversion();
-        $requiredPhpVersion = $composerConfig['php'];
-
-        $this->addRequirement(
-            version_compare(phpversion(), $requiredPhpVersion, '>='),
-            sprintf(
-                'PHP version must satisfy "%s" ("%s" installed)',
-                $requiredPhpVersion,
-                $installedPhpVersion
-            ),
-            ''
-        );
-    }
-
-    private function addExtensionRequirements(array $composerConfig)
-    {
-        foreach ($composerConfig as $package => $constraint) {
-            if (preg_match('/^ext-(?<extension>.+)$/', $package, $matches)) {
-                $this->addExtensionRequirement($matches['extension']);
-            }
-        }
-    }
-
-    /**
-     * @param string $extension Extension name, e.g. `iconv`.
-     */
-    private function addExtensionRequirement($extension)
-    {
-        $this->addRequirement(
-            extension_loaded($extension),
-            sprintf(
-                'The extension "%s" must be enabled.',
-                $extension
-            ),
-            ''
-        );
-    }
-}