The golang-github-svent-go-nbreader package has upstream code from 2015,
and appears unmaintained.  It has no reverse dependencies in Debian.

https://tracker.debian.org/pkg/golang-github-svent-go-nbreader

The upstream project had its last commit 12 years ago:

https://github.com/svent/go-nbreader

This removal request is part of a larger batch to remove 100+ unused
golang-*-dev packages from Debian.  I believe the QA cost associated
with keeping all of them is larger than the cost of (hopefully extremely
rare) re-introduction of any accidentally removed package if there is
ever any future need for it.  Meanwhile, I don't think it is useful to
keep this package in Debian.

/Simon

jas@frallan:~$ ssh mirror.ftp-master.debian.org dak rm -Rn golang-github-svent-go-nbreader
Will remove the following packages from unstable:

golang-github-svent-go-nbreader | 0~20150201-4 | source
golang-github-svent-go-nbreader-dev | 0~20150201-4 | all

Maintainer: Debian Go Packaging Team <team+pkg-go@tracker.debian.org>
------------------- Reason -------------------

----------------------------------------------

Checking reverse dependencies...
No dependency problem found.

jas@frallan:~$