various glade things not in SVN

Looking in detail at the contents of the mpl-directory, I notice that

A) the gui/ subdirectory off the main MPL source direcotry (the one with setup.py) does not exist in SVN

B) the file "lineprops.glade" referenced by backends/backend_gtk/DialogLineprops.py
does not exist in SVN

Is it safe to remove references to these things?

-Andrew