diff --git a/src/Symfony/Bundle/DoctrineBundle/DependencyInjection/DoctrineExtension.php b/src/Symfony/Bundle/DoctrineBundle/DependencyInjection/DoctrineExtension.php
index bf3bc49062..1c594e8fe4 100755
--- a/src/Symfony/Bundle/DoctrineBundle/DependencyInjection/DoctrineExtension.php
+++ b/src/Symfony/Bundle/DoctrineBundle/DependencyInjection/DoctrineExtension.php
@@ -16,7 +16,6 @@ use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Bundle\DoctrineAbstractBundle\DependencyInjection\AbstractDoctrineExtension;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Config\Definition\Processor;
diff --git a/src/Symfony/Bundle/DoctrineMigrationsBundle/DependencyInjection/DoctrineMigrationsExtension.php b/src/Symfony/Bundle/DoctrineMigrationsBundle/DependencyInjection/DoctrineMigrationsExtension.php
index 89cb6cf5cd..af9a9cbf55 100644
--- a/src/Symfony/Bundle/DoctrineMigrationsBundle/DependencyInjection/DoctrineMigrationsExtension.php
+++ b/src/Symfony/Bundle/DoctrineMigrationsBundle/DependencyInjection/DoctrineMigrationsExtension.php
@@ -11,11 +11,8 @@
 
 namespace Symfony\Bundle\DoctrineMigrationsBundle\DependencyInjection;
 
-use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Config\Definition\Processor;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
diff --git a/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/DoctrineMongoDBExtension.php b/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/DoctrineMongoDBExtension.php
index 5249af0288..b2d13d3a4c 100644
--- a/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/DoctrineMongoDBExtension.php
+++ b/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/DoctrineMongoDBExtension.php
@@ -11,13 +11,11 @@
 
 namespace Symfony\Bundle\DoctrineMongoDBBundle\DependencyInjection;
 
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Definition;
-use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Bundle\DoctrineAbstractBundle\DependencyInjection\AbstractDoctrineExtension;
 use Symfony\Component\Config\Definition\Processor;
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
index 47462bd071..51713df7f5 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
@@ -12,19 +12,14 @@
 namespace Symfony\Bundle\SecurityBundle\DependencyInjection;
 
 use Symfony\Component\Config\Definition\Processor;
-use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
-use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Parameter;
-use Symfony\Component\DependencyInjection\Definition;
-use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 use Symfony\Component\Config\FileLocator;
-use Symfony\Component\HttpFoundation\RequestMatcher;
 
 /**
  * SecurityExtension.
diff --git a/src/Symfony/Bundle/WebProfilerBundle/DependencyInjection/WebProfilerExtension.php b/src/Symfony/Bundle/WebProfilerBundle/DependencyInjection/WebProfilerExtension.php
index c819d2057a..2bcf81e809 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/DependencyInjection/WebProfilerExtension.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/DependencyInjection/WebProfilerExtension.php
@@ -15,8 +15,6 @@ use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\Config\FileLocator;
 
 /**