coveralls shows the python (twig?) file.
Also, the latest build is 09 Feb 2017 04:51PM UTC.
https://coveralls.io/r/google/go-github?branch=master

Furthermore, drone.io is 404.
https://drone.io/github.com/google/go-github/files/coverage.html

I think that setting is necessary again if coverage is necessary.
If coverage is unnecessary, should delete badges and links from the README.