Just to ensure that nothing is occurring, wait at least one more week. If you see no more activity, then you can remove the nest and signage. We are advocating one more week because of the late winter fronts that have occurred. Some birds are a little late in getting started this year in mating and nesting. But, one more week should give you the answer and there would be no harm in removing the nest and signage after that time. The Regal Swan