refactoring



git-svn-id: https://ejudge.ru/svn/ejudge/trunk/ejudge@7708 13e13086-cd15-0410-aeb9-89833061a40d


git-svn-id: https://ejudge.ru/svn/ejudge/trunk/ejudge@7709 13e13086-cd15-0410-aeb9-89833061a40d
obsolete and unused code is removed.



git-svn-id: https://ejudge.ru/svn/ejudge/trunk/ejudge@7710 13e13086-cd15-0410-aeb9-89833061a40d


git-svn-id: https://ejudge.ru/svn/ejudge/trunk/ejudge@7711 13e13086-cd15-0410-aeb9-89833061a40d