fix: remove cni dependency for flannel

[11qeq11]

What type of PR is this?

/kind bug

What this PR does / why we need it:

This is basically a follow-up to #9549 and #9563. When trying to remove node from cluster which has Flannel CNI, the job will fail with:

$ ansible-playbook -i inventory/kubespray-local-deployment/inventory.yml remove-node.yml -e node=kubespray-node-3 -b -v \
  --private-key=~/.ssh/id_ed25519
...
TASK [network_plugin/cni : CNI | Copy cni plugins] ****************************************************************************************
fatal: [kubespray-node-3]: FAILED! => {"changed": false, "msg": "Source '/tmp/releases/cni-plugins-linux-amd64-1.8.0.tgz' does not exist"}
...

Based on previous discussions, this dependency can be safely removed since it's not needed ever since https://github.com/kubernetes-sigs/kubespray/pull/9367/files.

Which issue(s) this PR fixes:

Haven't created one for Flannel.
Special notes for your reviewer:

Made this PR based on suggestions here.

Does this PR introduce a user-facing change?:

fix: remove cni dependency for flannel

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: 11qeq11 / name: Oleksandr Kozmenko (d20b24d)

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[yankay]

/ok-to-test

[11qeq11]

/retest

[cyclinder]

Thanks!

/lgtm

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This pull-request has been approved by: 11qeq11, cyclinder
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[11qeq11]

/assign @tico88612

[tico88612]

@11qeq11 I'm more curious about under what circumstances removing a node would copy the CNI file.
If that's the case, then other CNI plugins should also be removed, not just flannel.