Removed dead code

proj/sxgcore/vs2013/sxgcore.vcxproj

proj/sxgcore/vs2013/sxgcore.vcxproj.filters

source/GRegisterIndex.h

source/game/crosshair.cpp

source/gcore/bound.cpp

source/gcore/bound.h

source/gcore/gcore_utils.cpp

source/gcore/gcore_utils.h

source/gcore/oc.cpp

source/gcore/oc.h

source/gcore/sxgcore.cpp

source/gcore/sxgcore.h

source/light/light.h

source/mtrl/sxmtrl.cpp

source/mtrl/sxmtrl.h

source/xEngine/Engine.cpp