Revert "Added missing include for OpenSG."

This reverts commit 5e9c0be7adcc015f0855c1313e6998439f2b8efd.
Updated submodule ThirdParty/VtkFbxConverter.
Fixed linker error.
Fixed a warning.
Updated submodule ThirdParty/VtkFbxConverter.
Updated submodule ThirdParty/VtkFbxConverter.
Coping points within PointVec::makePntsUnique() is faster.
Coping points within PointVec::makePntsUnique() is faster.