widget from container. widget must be inside container.
Note that container will own a reference to widget, and that this
may be the last reference held; so removing a widget from its
container can destroy that widget. If you want to use widget
again, you need to add a reference to it while it's not inside
a container, If you don't want to use widget
again it's usually more efficient to simply destroy it directly
using gtkWidgetDestroy since this will remove it from the
container and help break any circular reference count cycles.gtkContainerRemove(object, widget)objectwidgetcontainer