Remove deprecated API from pygobject.h
Remove deprecated API from pygobject.h

https://bugzilla.gnome.org/show_bug.cgi?id=657416

pexip/pygobject,pexip/pygobject,thiblahute/pygobject,GNOME/pygobject,jdahlin/pygobject,MathieuDuponchelle/pygobject,jdahlin/pygobject,choeger/pygobject-cmake,davibe/pygobject,choeger/pygobject-cmake,choeger/pygobject-cmake,thiblahute/pygobject,jdahlin/pygobject,davibe/pygobject,MathieuDuponchelle/pygobject,sfeltman/pygobject,davibe/pygobject,pexip/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,GNOME/pygobject,davidmalcolm/pygobject,GNOME/pygobject,davibe/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,MathieuDuponchelle/pygobject,thiblahute/pygobject