Removed a few strange or obsolete i18n message strings

Note for the i18n team:

* For some reason *-banner-text-data-charges-yes
and *-banner-text-data-charges-no are used by one
translation in the includes/ZeroConfig.i18n.php -- no idea why.

* The folowing 3 messages were suprceeded by newer ones of similar meaning:
 -charge-auth     => -charge-auth
 -charge-auth-yes => -accept
 -charge-auth-no  => -go-back
In case the language is not translated, for the new ones, please
put the old one in with a "fuzy" mark. Thanks!

Change-Id: Ib2e432f0cf9c012699401c081abfd5235ac7f821
Merge "Removed a few strange or obsolete i18n message strings"