Backport remove unused branches from fs
Manually backport https://github.com/nodejs/node/pull/4795
Requested by @TheAlphaNerd in https://github.com/nodejs/node/pull/4795#issuecomment-185372606
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Manually backport https://github.com/nodejs/node/pull/4795
Requested by @TheAlphaNerd in https://github.com/nodejs/node/pull/4795#issuecomment-185372606