Removes a model from the selection. Subsequent calls to non-generic functions will apply to this selection.
Each connexion handle has its own selection.
Note that very few non-generic functions can manage several models, so you should consider using Opal_Select_One_Model to make sure there is only one selected model.
See also
Opal_Add_To_Selection, Opal_Select_One_Model, Opal_Clear_Selection
Note: This is a convenient wrapper of Opal_Command.
