It's classroom libraries, not school libraries, by your quote. So you've got that one wrong straight away.
Also it isn't banning books, it's only allowing books that are approved.
And they aren't being made to close their classroom libraries, they're obviously choosing to do that to try to claim that they have to due to the law. All they really have to do is only have books that are on the approved list.
It's all political theatre and hot air.