accelerators: remove Accelerators from feature gates

[mikedanese]

Passing this flag is preventing clusters from coming up:

server.go:165] unrecognized key: Accelerators

[k8s-ci-robot]

@mikedanese: Adding do-not-merge/release-note-label-needed because the release note process has not been followed.

One of the following labels is required "release-note", "release-note-action-required", or "release-note-none".
Please see: https://git.k8s.io/community/contributors/devel/pull-requests.md#write-release-notes-if-needed.

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[rohitagarwal003]

/lgtm

Sorry for missing this in #61498

[k8s-ci-robot]

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[k8s-github-robot]

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[k8s-github-robot]

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