net: simplify code Single-case select with a non-nil channel is pointless.
net: simplify code
Single-case select with a non-nil channel is pointless.

LGTM=mikioh.mikioh
R=mikioh.mikioh
CC=golang-codereviews
https://codereview.appspot.com/103920044

firebitsbr/golang-old,wesolows/golang,wesolows/golang,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang-old,wesolows/golang,wesolows/golang-old,wesolows/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old