Deprecate unused and obsolete macro
This macro is unused(see https://github.com/search?q=org%3AKDE+K_EXPORT_RUNNER_CONFIG&type=Code) and is IMO unnecessary, because the runner KCMs usually don't link to the KRunner library. And just linking to a lib for one macro makes no sense.
But because we shouldn't just remove macros in a minor release I have added a KF6 TODO.
Edited by Alexander Lohnau