[6.1] cs fixes

Author: nicolas-grekas

Tests/Adapter/ExtLdap/LdapManagerTest.php

@@ -13,7 +13,6 @@
 
 use Symfony\Component\Ldap\Adapter\CollectionInterface;
 use Symfony\Component\Ldap\Adapter\ExtLdap\Adapter;
-use Symfony\Component\Ldap\Adapter\ExtLdap\Collection;
 use Symfony\Component\Ldap\Adapter\ExtLdap\UpdateOperation;
 use Symfony\Component\Ldap\Entry;
 use Symfony\Component\Ldap\Exception\LdapException;