[release-4.15] NO-JIRA: remove PrivateIngressController cleanup

[openshift-cherrypick-robot]

This is an automated cherry-pick of #3489

/assign hasueki

[sjenning]

/approve
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: openshift-cherrypick-robot, sjenning

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[sjenning]

/test e2e-aws

[hasueki]

/retest

[sjenning]

/test e2e-aws

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD c1e0a17 and 2 for PR HEAD b8565d4 in total

[sjenning]

stars are aligned against this one

/override ci/prow/e2e-aws

[openshift-ci]

@sjenning: Overrode contexts on behalf of sjenning: ci/prow/e2e-aws

In response to this:

stars are aligned against this one

/override ci/prow/e2e-aws

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[openshift-ci]

@openshift-cherrypick-robot: 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-aws	b8565d4	link	true	/test e2e-aws

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