Geometry_Engine: DistributeOutlines to remain

#### Broken rules:
DistributeOutlines was deprecated as it was planned to be moved to the Spatial_Engine, but as it is a geometrical operation and is currently used in the Geometry_Engine it should remain. (Create `PlanarSurface` needs it and can't reference Spatial_Engine)

So the deprecated attribute should at least be removed

If the code is identical (or close enough) the method in Spatial_Engine should be made to use this one.
Otherwise some other kind of unification should be found, dislike the thought of identical methods in different projects which does different things