Remove travis build
Remove travis build

- Hard to keep the travis mac OS up-to-date
- Current CAPI team didn't get any value out of these builds

Signed-off-by: Lyle Franklin <31e283733c7a4b3b6cb03b95ab535671c2112bbe@pivotal.io>

cloudfoundry-incubator/sprout-capi,cloudfoundry-incubator/sprout-capi