obsolete call in LifecycleContainerBuilder

Guilty code in buildContainer():
--%<----------
// register the child in the parent so that lifecycle can be propagated down the hierarchy
if (parentContainer != null && parentContainer instanceof MutablePicoContainer)

{ MutablePicoContainer mutableContainer = (MutablePicoContainer) parentContainer; mutableContainer.unregisterComponentByInstance(container); mutableContainer.registerComponentInstance(containerRef, container); }

--%<----------

It makes no sense for me to unregister component by instance, when
you have just build new container. It's clear that this instance is not there.

So mutableContainer.unregisterComponentByInstance(container) is just obsolete and is alrteady done in killContainer();