I do not generally agree with censorship, and this re-writing of fictional books from previous eras seems a tad over the top to me.
That having been said, you could argue that the books could be culled on the grounds of relevance - not sure quite how popular they are nowadays, or how relevant. All I remember of the books was essentially that if you had read one, you had read all of them, and the phrase "lashings of ginger beer" which very likely did not come the books at all but came from some parody or other, probably the Comic Strip Presents... team.
I hardly think extrapolating the offence to include the potential culling/banning of either Shakespeare or Dickens is warranted, nor is the analogy with Nazi Germany ( Godwin in the OP?)
Nor can you really equate "To Kill a Mockingbird" a story exploring the issues, values and attitudes of the time and culture into which it was set, with "The Famous Five" and Blytons work, which tended to explore the relationship between rich kids, pushbikes, pesky foreign blighters breaking the law and tables groaning under the weight of ham sandwiches, pickled onions and other such delicacies :)