Remove commented draw_shape_sample code
Remove commented draw_shape_sample code

This can now be done quite easily with get_shape_model().draw_sample(...) + draw_sample(expression_model, ...).
If we ever do need a convenience function for this, we can always add one to ExpressionModel.hpp or MorphableModel.hpp using this code.

patrikhuber/eos,patrikhuber/eos,patrikhuber/eos