Removed unused files.

interface/lib/classes/db_firebird.inc.php

interface/web/designer/form/empty.dir

interface/web/designer/form_edit.php

interface/web/designer/form_list.php

interface/web/designer/form_show.php

interface/web/designer/index.php

interface/web/designer/lib/admin.conf.php

interface/web/designer/lib/lang/ar.lng

interface/web/designer/lib/lang/ar_form_edit.lng

interface/web/designer/lib/lang/ar_form_list.lng

interface/web/designer/lib/lang/ar_form_show.lng

interface/web/designer/lib/lang/ar_module_edit.lng

interface/web/designer/lib/lang/ar_module_list.lng

interface/web/designer/lib/lang/ar_module_nav_edit.lng

interface/web/designer/lib/lang/ar_module_nav_item_edit.lng

interface/web/designer/lib/lang/ar_module_show.lng

interface/web/designer/lib/lang/bg.lng

interface/web/designer/lib/lang/bg_form_edit.lng

interface/web/designer/lib/lang/bg_form_list.lng

interface/web/designer/lib/lang/bg_form_show.lng