gtk/gtk.go
func (v *Entry) RemoveIcon(iconPos EntryIconPosition) {
	C.gtk_entry_set_icon_from_icon_name(v.native(),
		C.GtkEntryIconPosition(iconPos), nil)
}
func (v *Entry) RemoveIcon(iconPos EntryIconPosition) {
	C.gtk_entry_set_icon_from_icon_name(v.native(),
		C.GtkEntryIconPosition(iconPos), nil)
}
// RemoveIcon() is a wrapper around gtk_entry_set_icon_from_icon_name()
// with a nil pointer to the icon name.