gobject-2.0: Remove Object.finalize binding
gobject-2.0: Remove Object.finalize binding

Overriding Object.finalize conflicts with destructors.

Fixes bug 592265.

tjol/vala-tjol,spidermonkdust/vala,themiwi/vala,flobrosch/vala-fixes,GNOME/vala,jessevdk/vala,themiwi/vala,severinh/vala,Distrotech/vala,flobrosch/vala-fixes,frida/vala,severinh/vala,playya/vala,kamanashisroy/aroop,Distrotech/vala,spidermonkdust/vala,flobrosch/vala-fixes,GNOME/vala,kamanashisroy/aroop,tjol/vala-tjol,kamanashisroy/aroop,rvu95/vala,severinh/vala,spidermonkdust/vala,rvu95/vala,tjol/vala-tjol,jessevdk/vala,jessevdk/vala,themiwi/vala,playya/vala,GNOME/vala,frida/vala,rvu95/vala,frida/vala,playya/vala,xdave/pvala,Distrotech/vala,GNOME/vala,frida/vala,frida/vala