dashboard: hide build status column (package builder is out of action)
dashboard: hide build status column (package builder is out of action)

R=golang-dev, dsymonds
CC=golang-dev
http://codereview.appspot.com/5489080

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang