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

- 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.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lance5890
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[lance5890]

/cc @wking

[lance5890]

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