Remove unecessary finalizers on GValue
Remove unecessary finalizers on GValue

It errors on some singnal handlers due having double SetFinalizer() call

pekim/gotk3,andre-hub/gotk3,pekim/gotk3,yamnikov-oleg/gotk3,gotk3/gotk3,andre-hub/gotk3,yamnikov-oleg/gotk3,gotk3/gotk3,pekim/gotk3,andre-hub/gotk3,yamnikov-oleg/gotk3