Revert "admin-gates: Add ack-4.11-kube-1.25-api-removals-in-4.12 gate"

[wking]

Reverts #772

It's tripping up tech-preview informers like this:

: [sig-cluster-lifecycle] TestAdminAck should succeed [Suite:openshift/conformance/parallel]
Run #0: Failed	3m3s

{  fail [github.com/openshift/origin/test/extended/util/openshift/clusterversionoperator/adminack.go:117]: May  6 07:24:05.028: Error while waiting for Upgradeable to go AdminAckRequired with message "Kubernetes 1.25 and therefore OpenShift 4.12 remove several APIs which require admin consideration. Please see\nthe knowledge article https://access.redhat.com/articles/6955381 for details and instructions.\n": timed out waiting for the condition
Upgradeable: Status=False, Reason=MultipleReasons, Message="Cluster should not be upgraded between minor versions for multiple reasons: AdminAckRequired,FeatureGates_RestrictedFeatureGates_TechPreviewNoUpgrade\n* Kubernetes 1.25 and therefore OpenShift 4.12 remove several APIs which require admin consideration. Please see\nthe knowledge article https://access.redhat.com/articles/6955381 for details and instructions.\n\n* Cluster operator kube-apiserver should not be upgraded between minor versions: FeatureGatesUpgradeable: \"TechPreviewNoUpgrade\" does not allow updates".}

Opening a revert while we sort out the test issue. CC @LalatenduMohanty

[openshift-ci]

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[LalatenduMohanty]

/hold as I am trying to understand how soon we can fix origin tests

[wking]

openshift/origin#27110 is my attempt at an origin fix, but to keep CI healthy, folks prefer reverting quickly, because real fixes can sometimes take a while, and rereverting is cheap ;).

[openshift-ci]

@wking: all tests passed!

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[wking]

openshift/origin#27110 recovered the job.