Merge branch '4.4' into 5.0

* 4.4: (21 commits)
  fix merge
  CS
  [FrameworkBundle][ContainerLintCommand] Improve messages when the kernel or the container is not supported
  [Serializer] Skip uninitialized (PHP 7.4) properties in PropertyNormalizer and ObjectNormalizer
  stop using deprecated Doctrine persistence classes
  [Cache] Fix wrong classname in deprecation message
  Fix regex lookahead syntax in ApplicationTest
  Fixed syntax in comment
  [SecurityBundle][FirewallMap] Remove unused property
  [Messenger][AMQP] Use delivery_mode=2 by default
  [FrameworkBundle][DependencyInjection] Skip removed ids in the lint container command and its associated pass
  [SECURITY] Revert "AbstractAuthenticationListener.php error instead info. Rebase of #28462"
  [FrameworkBundle][Secrets] Hook configured local dotenv file
  [DI] Improve performance of processDefinition
  fix redis multi host dsn not recognized
  fix constructor argument type declaration
  Fix invalid Windows path normalization
  [Validator][ConstraintValidator] Safe fail on invalid timezones
  [DoctrineBridge] Fixed submitting invalid ids when using queries with limit
  [FrameworkBundle] Add info & example to auto_mapping config
  ...

Author: nicolas-grekas

Security/FirewallMap.php

@@ -26,13 +26,11 @@ class FirewallMap implements FirewallMapInterface
 {
     private $container;
     private $map;
-    private $contexts;
 
     public function __construct(ContainerInterface $container, iterable $map)
     {
         $this->container = $container;
         $this->map = $map;
-        $this->contexts = new \SplObjectStorage();
     }
 
     public function getListeners(Request $request)