@Override
	public void removeMarkerForGroup(String groupName, MarkerSet markers, Program program) {
		Map<Program, MarkerSetImpl> markersByProgram = programMarkersByGroup.get(groupName);
		MarkerSet previousMarkers = markersByProgram.get(program);

		if (markers == previousMarkers) {
			markersByProgram.remove(program);
			removeMarker(previousMarkers, program);
		}
	}
Call to signal that the markers for a given program have changed in some way, such as being
removed, changing colors or the active state being changed

@param p the program associated with the markers
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/marker/MarkerManager.java