Remove second parameter from TranslateUtils::getLanguageName()

Was marked as a code path to be deprecated. Also checked TranslateSVG,
TranslationNotifications and CentralNotice for possible usages.

Change-Id: Icf216db16f46c4d6c4cc9862814397e43f3b310f
Merge "Remove second parameter from TranslateUtils::getLanguageName()"