Merge pull request #568 from ANTsX/viz-tests

Add more plotting tests

Author: Nick Cullen

ants/viz/__init__.py

@@ -7,7 +7,3 @@
 from .plot_ortho import plot_ortho
 from .plot_ortho_stack import plot_ortho_stack
 from .plot_directory import plot_directory
-
-from .render_surface_function import render_surface_function
-from .surface import (surf, surf_fold, surf_smooth, get_canonical_views)
-from .volume import (vol, vol_fold)