[x3d-public] removeNamedNode removes DEF children?

[microaaron at pku.edu.cn]

I think this function should be called "removeNodeName".
"removedNamedNode", as the name implies, is a node that is removed.

> It is C) None of the nodes gets removed from the scene graph, not even the „outer“ node. Because removedNamedNode does not remove nodes from the scene graph. Instead it removes the DEF name from the node.
> 
> Bye,
> 
> Patrick