travis-ci: Remove metadata-zip build and upload

Redhat marketplace requires bundle format metadata now.

.travis.yml

@@ -58,7 +58,6 @@ jobs:
  name: Publish Container Image
  script:
  - make operator-image
- - make metadata-zip
  - OPERATOR_IMAGE=storageos/cluster-operator:$TRAVIS_TAG make install-manifest
  before_deploy:
  - docker login -u "$REGISTRY_USER" -p "$REGISTRY_PASS"
@@ -71,7 +70,6 @@ jobs:
  api_key:
  secure: 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
  file:
- - build/_output/storageos-olm-metadata.zip
  - storageos-operator.yaml
  skip_cleanup: true
  on: