Getting rid of discriminatory or obsolete laws is a responsibility of Congress. They can have staffers collect the pertinent legislation, put it all in a package or categorical packages and with a single bill eliminate the bunch. I certainly do not want some clever legal justification for improper acts based on laws pertaining to the details of life in the 1800's - particularly laws that run counter to current practice - and especially discriminatory laws. I do not like having to take out the garbage, but it has to be done at least eventually. This is no different: Congress take out your garbage before some legal rats can scurry around and feast on your discarded scraps.