content/en/case-studies: remove OWNERS

[nikhita]

For kubernetes/org#2013

As a part of cleaning up inactive members (who haven't been active since
the release of v1.11) from OWNERS, this commit removes the OWNERS file
for content/en/case-studies.

Original commit message below.

---

As a part of cleaning up inactive members (who haven't been active since
the release of v1.11) from OWNERS, this commit removes sarahkconway from
the content/en/case-studies/OWNERS file.

Note: With this change, we are only left with one approver for this
directory. We should look at adding more approvers, but this commit
addresses the problem for the short term by ensuring that the bot
doesn't suggest inactive members for approval.

/assign @alexcontini @zacharysarah
cc @mrbobbytables @SarahKConway

[k8s-ci-robot]

@nikhita: GitHub didn't allow me to assign the following users: alexcontini.

Note that only kubernetes members, repo collaborators and people who have commented on this issue/PR can be assigned. Additionally, issues/PRs can only have 10 assignees at the same time.
For more information please see the contributor guide

In response to this:

For kubernetes/org#2013

As a part of cleaning up inactive members (who haven't been active since
the release of v1.11) from OWNERS, this commit removes sarahkconway from
the content/en/case-studies/OWNERS file.

Note: With this change, we are only left with one approver for this
directory. We should look at adding more approvers, but this commit
addresses the problem for the short term by ensuring that the bot
doesn't suggest inactive members for approval.

/assign @alexcontini @zacharysarah
cc @mrbobbytables @SarahKConway

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/test-infra repository.

[nikhita]

/hold

@nikhita: GitHub didn't allow me to assign the following users: alexcontini.

This is concerning because @alexcontini won't be able to lgtm/approve PRs either if they are not a member of the @kubernetes org.

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[zacharysarah]

@nikhita 👋 Coukd you please delete the entire OWNERS file here? Thank you! 🙇

[nikhita]

Done ✔️

[nikhita]

/hold cancel

[zacharysarah]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zacharysarah

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• content/en/case-studies/OWNERS [zacharysarah]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment