Question: can aizawa erase all might quirk?
Answer: According to the anime all for one is a quirk that can take and use quirks, and give them. It also says that it is a storage quirk so it means all of all for one's quirks are within his all for one quirk. There for Aizawa can erase all for one's all for one quirk, and all of all for one's other quirks with it.