Revert "UPSTREAM: 71804: Use UnmountMountPoint util to clean up subpaths"

[wking]

Reverts #22396

This is leading to many, many CI failures, including all of the nine runs of https://testgrid.k8s.io/redhat-openshift-release-blocking#redhat-release-openshift-origin-installer-e2e-aws-4.0&sort-by-flakiness= since the test was added. Revert to get us going again while we look into why.

CC @wongma7, @jwforres, @abhinavdahiya

[wking]

Also CC @jsafrane, @bertinatto. Not sure what I need to do about Travis:

The following commits contain vendor changes but aren't declared as UPSTREAM or bump(*) commits:

Anyone who does is welcome to fix my commit or create their own reverting PR to unstick CI.

[wking]

integration:

FAIL: github.com/openshift/origin/test/integration/runner TestIntegration/TestImageStreamImportRedHatRegistry 4m53.93s
FAIL: github.com/openshift/origin/test/integration/runner TestIntegration 60ms

Not much on why?

/test integration

[jsafrane]

The following commits contain vendor changes but aren't declared as UPSTREAM or bump(*) commits:

@wking, commit message must be in format UPSTREAM: 71804: revert ...

[jsafrane]

/approve

[wking]

commit message must be in format UPSTREAM: 71804: revert ...

Can you force-push to my branch or create a new PR? I'm restricted to GitHub's web UI for the next few hours, and they still don't seem to support amending commit messages.

[jsafrane]

Force pushed.

[bertinatto]

/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bertinatto, jsafrane, wking

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• vendor/k8s.io/kubernetes/pkg/util/mount/OWNERS [jsafrane]
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• vendor/k8s.io/kubernetes/test/e2e/storage/OWNERS [jsafrane]

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