Revert "Add golang 1.9 to travis"
Revert "Add golang 1.9 to travis"

This reverts commit 83f13f93a4e4032066aeadc61103797ec99e5f28.

nono/cozy-stack,nono/cozy-stack,nono/cozy-stack,nono/cozy-stack,nono/cozy-stack