[pkg-go] golang-github-go-openapi-validate is marked for autoremoval from testing

[Debian testing autoremoval watch]

golang-github-go-openapi-validate 0.0~git20160704.0.deaf2c9-1 is marked for autoremoval from testing on 2020-02-16

It (build-)depends on packages with these RC bugs:
947996: golang-github-mailru-easyjson: golang-github-mailru-easyjson FTBFS in testing/unstable