There's still tons of it around! The Marx Brothers movies are a great example of high-quality content with questionable segments that perfectly capture those old stereotypes. And as a classic movie fan, there are tons of movies with incidental black characters like that. I don't think those should all go in the bin, they are a product of their time.
The WB content is aimed at kids, and I think that makes a difference.
I don't think anybody is arguing for those Censored Eleven to be shown on TV. They're still out there for any adult who cares enough to find, I think that's enough.
For that matter, I wasn't even criticizing the OP document for missing those eleven. Given the time it was written it's quite possible the author didn't even have access to them. In any case, the omission of those few from what seems to be an otherwise comprehensive document is, I thought, notable.
The WB content is aimed at kids, and I think that makes a difference.