From https://github.com/sindresorhus/refined-github/pull/2114#issuecomment-499763367.
Part of filter-pr-by-build-status feature, if the repository doesn't have any checks then there is no need to create and add the filter dropdown.
We could piggyback on ci-link to see if CI is enabled on the repo. ci-link could probably export a promise that filter-pr-by-build-status can listen to
Can we just export fetchStatus function with a better name (Maybe fetchCIStatus) and use that? It's already wrapped with onetime so it won't be called again.