SL-16320 Remove obsolete AvaLine strings

indra/newview/skins/default/xui/da/strings.xml

indra/newview/skins/default/xui/de/strings.xml

indra/newview/skins/default/xui/es/strings.xml

indra/newview/skins/default/xui/fr/strings.xml

indra/newview/skins/default/xui/it/strings.xml

indra/newview/skins/default/xui/ja/strings.xml

indra/newview/skins/default/xui/pl/strings.xml

indra/newview/skins/default/xui/pt/strings.xml

indra/newview/skins/default/xui/ru/strings.xml

indra/newview/skins/default/xui/tr/strings.xml

indra/newview/skins/default/xui/zh/strings.xml