Remove deprecated libgnome(ui) dependency

[Andre Klapper]

According to http://www.gnome.org/~fpeters/299.html Inkscape depends on libgnome(ui).

libgnome(ui) will be removed for GNOME 3 in a few months.

http://live.gnome.org/LibgnomeMustDie
http://library.gnome.org/devel/libgnome/stable/libgnome-gnome-gconf.html

Grep'ing for "include <gnome" and "include <libgnome" brings up one match:
./src/libgdl/gdl-switcher.c:#include <libgnome/gnome-gconf.h>

As there is no "gnome_gconf" in that file it might be trivial to fix by just removing that header.

[jazzynico (jazzynico)]

We now have three deprecated dependencies reports :
* this one;
* #367606 (Remove deprecated Glib+ symbols);
* #367607 (Remove deprecated GTK+ symbols).

How critical are these bugs?
If GNOME 2 and 3 libs can coexist on the same computer, it's probably not *too* critical. If not, we should fix it ASAP (0.47, 0.47.1?). Could someone clarify?

[Andre Klapper (a9016009)]

GTK 2 and 3 will be able to coexist on the same computer.

Still this specific one here looks trivial to fix. :-)

[ScislaC (scislac)]

Committed modification in rev21888... Andre appears to be correct that it is an unused dependency. Thanks!