fix(notary): disables notary environment

This remvoes the notary/DCT environment variables. This currently has no
effect on the Ansible docker module and may potentially introduce issues
when the Ansible task is migrated to use shell: docker run.

This will be re-introduced in later patch.

Signed-off-by: Tin Lam <tin@irrational.io>
Change-Id: Ic0924bba94912680ea0ea775d9b08964fcafd4dc

tools/gate/jarvis/standard-container/assets/playbooks/roles/promote/tasks/main.yaml

@@ -71,7 +71,6 @@
       async: "{{ _async }}"
       poll: 0
       register: image_push_async_results
-      environment: "{{ docker_content_trust }}"
 
     - name: Wait for docker push results
       vars: