Remove duplicate fake and unused openapi

[apelisse]

What this PR does / why we need it:
Follow-up on PR #50404

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

Release note:

NONE

[apelisse]

Purely cosmetic PR, PTAL @mengqiy

[apelisse]

/retest

[pwittrock]

/approve no-issue

[mengqiy]

/lgtm

[k8s-github-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: apelisse, mengqiy, pwittrock

Associated issue: 50404

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• pkg/kubectl/OWNERS [pwittrock]

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[k8s-github-robot]

/test all [submit-queue is verifying that this PR is safe to merge]

[k8s-github-robot]

Automatic merge from submit-queue (batch tested with PRs 51682, 51546, 51369, 50924, 51827)

[k8s-ci-robot]

@apelisse: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
pull-kubernetes-e2e-kops-aws	54b9c22	link	/test pull-kubernetes-e2e-kops-aws

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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