Once again this is not true.
Brer Rabbit and his story comes from Africa. It long precedes white guy Joel Chandler Harris' Uncle Remus stories.
There is no reason to erase Brer Rabbit and African culture.
If you want to add a Tiana, Princess and the Frog ride fine. But there's no reason to get rid of the Brer Rabbit ride. Why not have two rides based on African cultures instead of keeping a quota of one.
https://en.wikipedia.org/wiki/Br'er_Rabbit
There's a huge difference between African folklore and slave folklore like Brer Rabbit and the Uncle Remus stories. The Uncle Remus stories may have their roots in African folklore, but they were borne and shaped by the trauma of slavery.