Revert "Set etcd url in cloud-config when external etcd is enabled"

[g-gaston]

Reverts #6195

[eks-distro-bot]

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[tatlat]

/lgtm

[g-gaston]

/test eks-anywhere-presubmit

[eks-distro-bot]

@g-gaston: 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
eks-anywhere-presubmit	eb22d13	link	true	/test eks-anywhere-presubmit

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[g-gaston]

/close

[eks-distro-bot]

@g-gaston: Closed this PR.

In response to this:

/close

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