Change string references, remove unused delegate function, very minor cleanup.
Change string references, remove unused delegate function, very minor cleanup.

benjaoming/installers,MCGallaspy/installers,mrpau/installers,learningequality/ka-lite-installers,MCGallaspy/installers,ruimalheiro/installers,ruimalheiro/installers,MCGallaspy/installers,learningequality/installers,mrpau/installers,MCGallaspy/installers,learningequality/ka-lite-installers,learningequality/installers,ruimalheiro/installers,learningequality/installers,mrpau/installers,learningequality/ka-lite-installers,ruimalheiro/installers,benjaoming/installers,learningequality/ka-lite-installers,learningequality/installers,benjaoming/installers,mrpau/installers,benjaoming/installers