[pkg-go] Bug#1133241: golang-github-unknwon-goconfig-dev has an undeclared file conflict on /usr/share/gocode/src/github.com/Unknwon

[Drew Parsons]

Package: golang-github-unknwon-goconfig-dev
Followup-For: Bug #1133241

golang-github-unknwon-com is abandoned upstream (repo is read-only
since Sep 3, 2021.  One option is to just drop it altogether.

It had a couple of versioned releases since the git commit release in
debian though.  It could be updated to the final release fixing the
install path at the same time.