@Override
	public void removeProjectView(URL url) {
		synchronized (otherViewsMap) {
			DefaultProjectData dataMgr = otherViewsMap.remove(url);
			if (dataMgr != null) {
				if (visibleViews.remove(url)) {
					notifyVisibleViewRemoved(url);
				}
				dataMgr.close();
				Msg.info(this, "Closed project view: " + GhidraURL.getDisplayString(url));
				changed = true;
			}
		}
	}
Remove the view from this project.
Ghidra/Framework/Project/src/main/java/ghidra/framework/project/DefaultProject.java