Remove dual mode from back-end
Remove dual mode from back-end

Settings for DUAL_MODE were removed from the back-end. Texcavator
supports single language only.

msassmann/texcavator,msassmann/texcavator,msassmann/texcavator,UUDigitalHumanitieslab/texcavator,UUDigitalHumanitieslab/texcavator,msassmann/texcavator,UUDigitalHumanitieslab/texcavator