i18n_noop

[Halla Rempt]

Hi,

I'm porting Krita to KF6 now, and I'm running into an issue: i18n_noop no 
longer exists. Both in Calligra and Krita, we have

const char* KoZoomMode::modes[] =
{
    I18N_NOOP("%1%"),
    I18N_NOOP("Fit Page Width"),
    I18N_NOOP("Fit Page"),
    0,
    I18N_NOOP("Actual Pixels")
};

in KoZoomMode.cpp -- but I18N_NOOP no longer exists. What should we use 
instead? Is there something that builds with both kf5 and kf6 or does it need 
ifdeffery?

Halla