[pkg-go] burrow is marked for autoremoval from testing

[Debian testing autoremoval watch]

burrow 1.2.1-1 is marked for autoremoval from testing on 2021-01-18

It (build-)depends on packages with these RC bugs:
976543: golang-github-rcrowley-go-metrics: FTBFS on arm64,ppc64el (arch:all-only src pkg): dh_auto_test: error: cd obj-aarch64-linux-gnu && go test -vet=off -v -p 4 github.com/rcrowley/go-metrics github.com/rcrowley/go-metrics/exp github.com/rcrowley/go-metrics/librato github.com/rcrowley/go-metrics/stathat returned exit code 1
 https://bugs.debian.org/976543



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