EXP-1634 FIXED Removed the "exchange rates" link from the L$ Buy Dialog.

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

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

indra/newview/skins/default/xui/en/floater_buy_currency.xml

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

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

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

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

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

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

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

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

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