The library becomes the anti-library, dedicated to limiting knowledge and eliminating the past. The fewer books there are, the easier it is to make sure that they are the right ones. Classic literature is full of dead white men and there are only so many books that the alliance of oppressed minorities of the moment can be expected to produce that people will want to read. The destruction of literacy is not an accidental malfunction of the educational system. Illiteracy is the intended outcome. That’s the anti-library future of the library, a community organizing hub that occasionally happens to have a few books tucked away somewhere.
Most likely, the libraries will not advertise book sales as they remove shelves. Instead they will quietly take the books to the paper recycler for destruction, to ensure they don’t end up in private collections.