[pkg-go] golang-github-dnephin-cobra is marked for autoremoval from testing

[Debian testing autoremoval watch]

golang-github-dnephin-cobra 1.5.1+git20170113.0.0e9ca70-3 is marked for autoremoval from testing on 2018-09-29

It (build-)depends on packages with these RC bugs:
902468: golang-github-mwitkow-go-conntrack: FTBFS in buster/sid (failing tests)