Remove ContactGeometry from Model since there's no ContactForce associated with it.
Remove ContactGeometry from Model since there's no ContactForce associated with it.

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core