Remove bathymetry operator.
It is no longer necessary to apply bathymetry to a model's tessellation. Since the means of applying bathymetry to a mesh is handled by ElevateMesh, this MR deprecates ApplyBathymetry and its associated classes & tests.
It is no longer necessary to apply bathymetry to a model's tessellation. Since the means of applying bathymetry to a mesh is handled by ElevateMesh, this MR deprecates ApplyBathymetry and its associated classes & tests.