void dispose() {
		projectData.removeFromIndex(fileID);
// NOTE: clearing the following can cause issues since there may be some residual
// activity/use which will get a NPE
//		parent = null;
//		projectData = null;
//		listener = null;
	}
Removes this file from file-index maintained by {@link ProjectData} instance
following its removal from the project.
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/GhidraFileData.java