godoc: remove some unused code

Run goimports while at it.

Change-Id: Ia3fea40835deb88bba0bb72c605bf02a6e407c88
Reviewed-on: https://go-review.googlesource.com/34953
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
3 files changed