Remove gtk/.gitignore
Remove gtk/.gitignore

gtk/.gitignore gets autogenerated and thus should not be part of git.

It currently being part of git is esp. annoying since depending on
wether you're building for gtk2 or gtk3, lines like:
/SpiceClientGtk-2.0.gir
/SpiceClientGtk-2.0.typelib
/libspice-client-gtk-2.0.la

Keep disappearing from it, leading to these changes accidentally
getting included into whatever commit your working on.

Signed-off-by: Hans de Goede <9fa1be1a5b5729e4c6b404f34c9ce49ff4882fd8@redhat.com>

freedesktop-unofficial-mirror/spice__spice-gtk,elmarco/spice-gtk,guodong/spice-gtk,mathslinux/spice-gtk,flexVDI/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,dezelin/spice-gtk,dezelin/spice-gtk,SPICE/spice-gtk,mathslinux/spice-gtk,mathslinux/spice-gtk,Fantu/spice-gtk,fgouget/spice-gtk,fgouget/spice-gtk,Fantu/spice-gtk,dezelin/spice-gtk,Fantu/spice-gtk,flexVDI/spice-gtk,mathslinux/spice-gtk,guodong/spice-gtk,elmarco/spice-gtk,SPICE/spice-gtk,SPICE/spice-gtk,guodong/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,elmarco/spice-gtk,Fantu/spice-gtk,SPICE/spice-gtk,elmarco/spice-gtk,dezelin/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,fgouget/spice-gtk,guodong/spice-gtk