all: remove unused code

Change-Id: I5bec6094d9dc5d16c685b8cbbecc7e1bb278fde9
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/487775
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
10 files changed