STYLE: Remove unimplemented function declaration in MetaObjectDocument
STYLE: Remove unimplemented function declaration in MetaObjectDocument

Change-Id: I5d0779e0046dcf0111901ee2221997c33930fd26

LucasGandel/TubeTK,KitwareMedical/ITKTubeTK,LucasGandel/TubeTK,matthieuheitz/TubeTK,cdeepakroy/TubeTK,matthieuheitz/TubeTK,sumedhasingla/TubeTK,sumedhasingla/TubeTK,aylward/ITKTubeTK,sumedhasingla/TubeTK,KitwareMedical/ITKTubeTK,aylward/ITKTubeTK,thewtex/TubeTK,LucasGandel/TubeTK,KitwareMedical/TubeTK,KitwareMedical/TubeTK,thewtex/TubeTK,KitwareMedical/TubeTK,LucasGandel/TubeTK,thewtex/TubeTK,cdeepakroy/TubeTK,matthieuheitz/TubeTK,cdeepakroy/TubeTK,thewtex/TubeTK,matthieuheitz/TubeTK,KitwareMedical/ITKTubeTK,sumedhasingla/TubeTK,KitwareMedical/TubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,KitwareMedical/ITKTubeTK,cdeepakroy/TubeTK