diff --git a/.github/workflows/code_analysis.yaml b/.github/workflows/code_analysis.yaml
index 28e08422582..1a4d31c2326 100644
--- a/.github/workflows/code_analysis.yaml
+++ b/.github/workflows/code_analysis.yaml
@@ -69,7 +69,9 @@ jobs:
                     -
                         name: 'Detect unused dependencies'
                         # "default" format overrides default "github" in CI
-                        run: vendor/bin/composer-unused --ansi --output-format=default
+                        run: |
+                            composer require icanhazstring/composer-unused --dev
+                            vendor/bin/composer-unused --ansi --output-format=default
 
         name: ${{ matrix.actions.name }}
         runs-on: ubuntu-latest
diff --git a/composer.json b/composer.json
index 44ece7d98a8..b4b5f73564a 100644
--- a/composer.json
+++ b/composer.json
@@ -34,10 +34,7 @@
         "rector/rector-phpunit": "dev-main",
         "rector/rector-symfony": "dev-main",
         "sebastian/diff": "^5.0",
-        "symfony/config": "^6.2",
         "symfony/console": "^6.3",
-        "symfony/contracts": "^3.2",
-        "symfony/dependency-injection": "6.1.*",
         "symfony/finder": "^6.3",
         "symfony/process": "^6.3",
         "symplify/easy-parallel": "^11.1",
@@ -46,7 +43,6 @@
     },
     "require-dev": {
         "cweagans/composer-patches": "^1.7.2",
-        "icanhazstring/composer-unused": "^0.8.5",
         "nategood/httpful": "^0.3.2",
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan-deprecation-rules": "^1.1",
diff --git a/src/Configuration/ConfigInitializer.php b/src/Configuration/ConfigInitializer.php
index d1c64c785fc..7c5b8104134 100644
--- a/src/Configuration/ConfigInitializer.php
+++ b/src/Configuration/ConfigInitializer.php
@@ -11,27 +11,18 @@
 use Rector\Core\Php\PhpVersionProvider;
 use Rector\PostRector\Contract\Rector\PostRectorInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
 
 final class ConfigInitializer
 {
     /**
-     * @var RectorInterface[]
-     */
-    private array $rectors = [];
-
-    /**
-     * @param RewindableGenerator<RectorInterface>|RectorInterface[] $rectors
+     * @param RectorInterface[] $rectors
      */
     public function __construct(
-        iterable $rectors,
+        private readonly array $rectors,
         private readonly InitFilePathsResolver $initFilePathsResolver,
         private readonly SymfonyStyle $symfonyStyle,
         private readonly PhpVersionProvider $phpVersionProvider,
     ) {
-        $this->rectors = $rectors instanceof RewindableGenerator ? iterator_to_array(
-            $rectors->getIterator()
-        ) : $rectors;
     }
 
     public function createConfig(string $projectDirectory): void
diff --git a/src/Configuration/Parameter/SimpleParameterProvider.php b/src/Configuration/Parameter/SimpleParameterProvider.php
index 0b216b13134..43f5c708297 100644
--- a/src/Configuration/Parameter/SimpleParameterProvider.php
+++ b/src/Configuration/Parameter/SimpleParameterProvider.php
@@ -5,7 +5,7 @@
 namespace Rector\Core\Configuration\Parameter;
 
 use Rector\Core\Configuration\Option;
-use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Rector\Core\Exception\ShouldNotHappenException;
 use Webmozart\Assert\Assert;
 
 /**
@@ -113,6 +113,6 @@ private static function ensureParameterIsSet(string $name): void
             return;
         }
 
-        throw new ParameterNotFoundException($name);
+        throw new ShouldNotHappenException(sprintf('Parameter "%s" was not found', $name));
     }
 }
diff --git a/src/Console/Command/ListRulesCommand.php b/src/Console/Command/ListRulesCommand.php
index b90918e2f62..344a85eccd8 100644
--- a/src/Console/Command/ListRulesCommand.php
+++ b/src/Console/Command/ListRulesCommand.php
@@ -15,30 +15,18 @@
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
 
 final class ListRulesCommand extends Command
 {
     /**
-     * @var RectorInterface[]
-     */
-    private array $rectors = [];
-
-    /**
-     * @param RewindableGenerator<RectorInterface>|RectorInterface[] $rectors
+     * @param RectorInterface[] $rectors
      */
     public function __construct(
         private readonly SymfonyStyle $symfonyStyle,
         private readonly SkippedClassResolver $skippedClassResolver,
-        iterable $rectors
+        private readonly array $rectors
     ) {
         parent::__construct();
-
-        if ($rectors instanceof RewindableGenerator) {
-            $rectors = iterator_to_array($rectors->getIterator());
-        }
-
-        $this->rectors = $rectors;
     }
 
     protected function configure(): void
diff --git a/src/DependencyInjection/CompilerPass/RemoveSkippedRectorsCompilerPass.php b/src/DependencyInjection/CompilerPass/RemoveSkippedRectorsCompilerPass.php
deleted file mode 100644
index 106109d8145..00000000000
--- a/src/DependencyInjection/CompilerPass/RemoveSkippedRectorsCompilerPass.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Rector\Core\DependencyInjection\CompilerPass;
-
-use Rector\Core\Configuration\Option;
-use Rector\Core\Configuration\Parameter\SimpleParameterProvider;
-use Rector\Core\Contract\Rector\RectorInterface;
-use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-
-/**
- * This compiler pass removed Rectors skipped in `SKIP` parameters.
- * It uses Skipper from Symplify - https://github.com/symplify/skipper
- */
-final class RemoveSkippedRectorsCompilerPass implements CompilerPassInterface
-{
-    public function process(ContainerBuilder $containerBuilder): void
-    {
-        $skippedRectorClasses = $this->resolveSkippedRectorClasses();
-
-        foreach ($containerBuilder->getDefinitions() as $id => $definition) {
-            if ($definition->getClass() === null) {
-                continue;
-            }
-
-            if (! in_array($definition->getClass(), $skippedRectorClasses, true)) {
-                continue;
-            }
-
-            $containerBuilder->removeDefinition($id);
-        }
-    }
-
-    /**
-     * @return string[]
-     */
-    private function resolveSkippedRectorClasses(): array
-    {
-        $skipParameters = SimpleParameterProvider::provideArrayParameter(Option::SKIP);
-
-        return array_filter($skipParameters, fn ($element): bool => $this->isRectorClass($element));
-    }
-
-    private function isRectorClass(mixed $element): bool
-    {
-        if (! is_string($element)) {
-            return false;
-        }
-
-        return is_a($element, RectorInterface::class, true);
-    }
-}
diff --git a/src/PhpParser/NodeTraverser/RectorNodeTraverser.php b/src/PhpParser/NodeTraverser/RectorNodeTraverser.php
index 511c9d6b880..a069df0ee37 100644
--- a/src/PhpParser/NodeTraverser/RectorNodeTraverser.php
+++ b/src/PhpParser/NodeTraverser/RectorNodeTraverser.php
@@ -8,25 +8,18 @@
 use PhpParser\NodeTraverser;
 use Rector\Core\Contract\Rector\PhpRectorInterface;
 use Rector\VersionBonding\PhpVersionedFilter;
-use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
 
 final class RectorNodeTraverser extends NodeTraverser
 {
     private bool $areNodeVisitorsPrepared = false;
 
     /**
-     * @var PhpRectorInterface[]
-     */
-    private array $phpRectors = [];
-
-    /**
-     * @param RewindableGenerator<PhpRectorInterface>|PhpRectorInterface[] $phpRectors
+     * @param PhpRectorInterface[] $phpRectors
      */
     public function __construct(
-        iterable $phpRectors,
+        private array $phpRectors,
         private readonly PhpVersionedFilter $phpVersionedFilter
     ) {
-        $this->phpRectors = is_array($phpRectors) ? $phpRectors : iterator_to_array($phpRectors);
         parent::__construct();
     }