ntp: Remove removal of chrony container

The chrony container removal was performed in the Xena cycle, so we no
longer require this task in the 'overcloud host configure' command.

Change-Id: I86fcc75e844eb922f62c90c45a105519845cc1a7

ansible/roles/ntp/tasks/prepare.yml

@@ -17,23 +17,3 @@
     state: "{{ 'stopped' if service_exists else omit }}"
   become: true
   with_items: "{{ ntp_service_disable_list }}"
-
-- name: Remove kolla-ansible installed chrony container
-  shell:
-    cmd: >
-      if [[ -n $(docker ps -aq -f name=chrony) ]]; then
-        docker rm -f -v chrony
-      fi
-    executable: "/bin/bash"
-  register: result
-  changed_when: result.stdout != ""
-  become: true
-  # NOTE(wszumski):  There is an ordering issue where on a fresh host, docker
-  # will not have been configured, but if that is the case, the chrony container
-  # can't possibly exist, but trying to execute this unconditionally will fail
-  # with: No module named 'docker' as we have not yet added the docker package
-  # to the kayobe target venv, so we use 'docker rm' command with force and
-  # don't fail on error.
-  when:
-    - "'docker.service' in ansible_facts.services"
-    - ansible_facts.services['docker.service'].status == 'running'