Moved normal/tangents generation to submeshes

Former-commit-id: d043284a1a5810b429cc76d8bc071010985a523b

include/Nazara/Utility/StaticMesh.hpp

@@ -25,8 +25,6 @@ class NAZARA_API NzStaticMesh final : public NzSubMesh, NzResourceListener
 		bool Create(NzVertexBuffer* vertexBuffer);
 		void Destroy();
 
-		void Finish();
-
 		bool GenerateAABB();
 
 		const NzCubef& GetAABB() const override;