Remove Golang install from guardian-windows CI job
Remove Golang install from guardian-windows CI job

Golang now gets installed on the concourse Windows worker as part of
windows-tools.

Signed-off-by: Tiago Scolari <f438736fd7dd1cb07f8d2a37f4499d0a0272a752@pivotal.io>

cloudfoundry-incubator/guardian-release,cloudfoundry-incubator/guardian-release,cloudfoundry-incubator/guardian-release