I removed a C++ actor component off a custom base class off of ACharacter. I have blueprints that used this custom base class. I have recompiled the blueprints with no error. I have deleted the binary and intermediate directories. (Re)Generated the Visual Studio Files.
Ok, so the pattern of “Ask question, find the answer yourself immediately after” hits again.
I use “Save on compile->On Success Only”. This does not work in this scenario. You have to hit the Save button. I did this on each blueprint and now I no longer get those warnings.