Merge branch '3.0'

* 3.0:
  fixed CS
  fixed CS
  fixed CS
  fixed test
  fixed CS
  Remove default match from AbstractConfigCommand::findExtension
  Remove unused imports
  [FrameworkBundle][Validator] Fix apc cache service deprecation

Author: fabpot

RememberMe/PersistentTokenBasedRememberMeServices.php

@@ -19,7 +19,6 @@
 use Symfony\Component\Security\Core\Exception\CookieTheftException;
 use Symfony\Component\Security\Core\Authentication\RememberMe\PersistentToken;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
-use Psr\Log\LoggerInterface;
 
 /**
  * Concrete implementation of the RememberMeServicesInterface which needs