Once we've switched from the migration build of Vue 3 to the regular build of Vue 3, the compatConfig settings in component definitions will be ignored, and we should remove them.
Code search: https://codesearch.wmcloud.org/search/?q=compatConfig&i=nope&files=&excludeFiles=&repos=
In addition, we should remove (conditional) calls to Vue.configureCompat. Some repos erroneously use configureCompat as a component setting instead of compatConfig, so we should remove those as well.
Code search: https://codesearch.wmcloud.org/search/?q=configureCompat&files=&excludeFiles=&repos=