qdoc documentation features the Cpp.ignoretokens, Cpp.ignoredirectives variables:

https://doc.qt.io/qt-6/23-qdoc-configuration-cppvariables.html

Anyhow, it looks like these are only used anymore since the switch to ClangDocParser. We should therefore remove or deprecate the config setting, as well as remove remainders in .qdocconf files (mostly qtbase).