Remove travis as this is now done in the staging/prod deployment

Change-Id: I3f545645158082b108b39443adabc6ce91f01785
Reviewed-on: http://reviews.cloudfoundry.org/13729
Tested-by: CI Master <cf-ci@rbcon.com>
Reviewed-by: Pivotal Labs <pivotal-vmware@googlegroups.com>
Reviewed-by: Jesse Zhang <jessezhang@vmware.com>