Remove Japanese and Korean translations
Remove Japanese and Korean translations

They are not complete (by far).

Contributes to issue CURA-3487.

hmflash/Cura,Curahelper/Cura,Curahelper/Cura,ynotstartups/Wanhao,fieldOfView/Cura,hmflash/Cura,fieldOfView/Cura,ynotstartups/Wanhao