The constructor is invalid, because one cannot create or obtain and pass
an IGUIObject C++ class instance pointer via JS, only triggering a crash
when doing something with it.
If there was a use case, the GUIObject should be created with a
GUIObject type specific constructor.
Remove obsolete getProperty comments.
From D1699, refs #5369 and wraitiis equivalent:
Differential Revision: https://code.wildfiregames.com/D1933
This was SVN commit r22530.
elexis
227957cd99