MAGETWO-55339: Upgrade failure

Author: rganin

app/code/Magento/Backend/etc/di.xml

@@ -71,7 +71,6 @@
             <argument name="backendHelper" xsi:type="object">Magento\Backend\Helper\Data\Proxy</argument>
         </arguments>
     </type>
-    <preference for="Magento\Framework\Authorization\RoleLocatorInterface" type="Magento\Backend\Model\Authorization\RoleLocator" />
     <preference for="Magento\Framework\Authorization\PolicyInterface" type="Magento\Framework\Authorization\Policy\Acl"/>
     <preference for="Magento\Framework\Acl\AclResource\ProviderInterface" type="Magento\Framework\Acl\AclResource\Provider"/>
     <type name="Magento\Framework\Acl\AclResource\Config\Reader\Filesystem">