[release-branch.go1.3] go.tools/godoc: remove Google+ buttons

««« CL 138180043 / 9b1966d73f3f
go.tools/godoc: remove Google+ buttons

LGTM=bradfitz
R=golang-codereviews, bradfitz, dsymonds
CC=golang-codereviews
https://golang.org/cl/138180043
»»»

TBR=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/165390043
3 files changed