undo CL 13321048 / 9567c5da6e25

Makes build unnecessarily slower. Will fix the parser instead.

??? original CL description
runtime/pprof: run TestGoroutineSwitch for longer

Short test now takes about 0.5 second here.

Fixes issue 6417.

The failure was also seen on our builders.

R=golang-dev, minux.ma, r
CC=golang-dev
https://codereview.appspot.com/13321048
???

R=golang-dev, minux.ma
CC=golang-dev
https://codereview.appspot.com/13720048