Remove FrameDifference9Bits and create just one module with args

Use can select the number of bits for the difference

modules/PlaYUVerModuleFactory.cpp

@@ -41,7 +41,6 @@ PlaYUVerModuleFactory::PlaYUVerModuleFactory()
   Register( "FilterComponentChromaV", &FilterComponentChromaV::Create );
   Register( "AbsoluteFrameDifference", &AbsoluteFrameDifference::Create );
   Register( "FrameDifference", &FrameDifference::Create );
-  Register( "FrameDifference9Bits", &FrameDifference9Bits::Create );
   Register( "SetChromaHalfScale", &SetChromaHalfScale::Create );
   Register( "FrameCrop", &FrameCrop::Create );
   Register( "FrameBinarization", &FrameBinarization::Create );