NO-JIRA: remove default ServiceAccount which is deleted

[lance5890]

- What I did

1. As the default sa have already deleted in OCPBUGS-16905: install: Recreate and delayed default ServiceAccount deletion #3895
2. And this yaml only works when upgrade from 4.13 to 4.14, no need to keep it in newest version(4.20)
   remove the deleted yaml in mco

address openshift/cluster-version-operator#1207
- How to verify it

- Description for the changelog

[openshift-ci-robot]

@lance5890: This pull request explicitly references no jira issue.

In response to this:

- What I did

- How to verify it

- Description for the changelog

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[openshift-ci]

Hi @lance5890. Thanks for your PR.

I'm waiting for a openshift member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[lance5890]

/cc @wking

[lance5890]

cvo will skip this yaml with this annotation
and this only works when upgrade

[umohnani8]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lance5890, umohnani8

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• OWNERS [umohnani8]

Approvers can indicate their approval by writing /approve in a comment
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[umohnani8]

/ok-to-test

[lance5890]

/retest-required

[openshift-ci]

@lance5890: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-azure-ovn-upgrade-out-of-change	a634570	link	false	/test e2e-azure-ovn-upgrade-out-of-change

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.