Clean up top-level namespace

[philippjfr]

I'd like to clean up the top-level namespace, here's what I don't think belongs there:

Element, Element2D, Element3D, Dimensioned, AttrTree, NdMapping, Overlayable, StoreOptions, BoundingBox, UniformNdMapping, ViewableElement, Overlayable, CompositeOverlay

If possible I'd also like to suppress these from showing up on the module level dir:

absolute_import, f, pydoc, print_function, hv, np, os, param, warnings

[jlstevens]

I think I agree with that list.

edit Though I think Element is used somewhere as the simplest example of an element that is not concrete, does not visualize but has a repr?

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.