Removed dead code and various cleaning

Author: saro0h

Core/Validator/Constraints/UserPasswordValidator.php

@@ -14,7 +14,6 @@
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Security\Core\Encoder\EncoderFactoryInterface;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
-use Symfony\Component\Validator\Context\ExecutionContextInterface;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
 use Symfony\Component\Validator\Exception\ConstraintDefinitionException;