private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException {
		ois.defaultReadObject();
		listenerList = WeakDataStructureFactory.createCopyOnReadWeakSet();
	}
Remove the category change listener.
@param l the listener to be removed.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeManagerChangeListenerHandler.java