public void removeListingMergePanel() {
		SwingUtilities.invokeLater(() -> {
			showMergeTool();
			if (!isShowingListingMergePanel) {
				return;
			}

			mergePanel.removeDomainObjectListener();
			List<Plugin> list = new ArrayList<>();
			list.add(listingPlugin);
			list.add(goToPlugin);
			mergeTool.removePlugins(list);
			isShowingListingMergePanel = false;
			mergePlugin.showDefaultComponent();
		});
	}
Remove the listing merge panel from the merge manager.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/ProgramMultiUserMergeManager.java