WINGs: remove dead code from 'loadPixmaps'
It seems the code had the possibility to load a default icon, probably to
be used on the windows if the main program does not provide any.
This code however have never been enabled, probably because it is better to
not provide an icon and let the window manager use its own.
This patch then removes that dead code, but keeps the image as part of the
WINGs resource for the case where an application would have been using it.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>