Remove duplicated kubeadm instructions

[maciaszczykm]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #2771

Special notes for your reviewer:

Release note:

Remove duplicated KubeAdm hints from cluster page.

/cherrypick release/v2.16

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: maciaszczykm

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• OWNERS [maciaszczykm]

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[maciaszczykm]

/cherrypick release/v2.16
/assign @kgroschoff @floreks

[kubermatic-bot]

@maciaszczykm: once the present PR merges, I will cherry-pick it on top of release/v2.16 in a new PR and assign it to you.

In response to this:

/cherrypick release/v2.16
/assign @kgroschoff @floreks

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kgroschoff]

/lgtm

[kubermatic-bot]

LGTM label has been added.

Git tree hash: a35781330bcf3b869438a7253e36f7fbf038b617

[codecov]

Codecov Report

Merging #3114 (7f51259) into master (a65af5a) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3114      +/-   ##
==========================================
+ Coverage   51.72%   51.73%   +0.01%     
==========================================
  Files         244      244              
  Lines        8545     8547       +2     
  Branches      886      886              
==========================================
+ Hits         4420     4422       +2     
  Misses       4121     4121              
  Partials        4        4              

Impacted Files	Coverage Δ
src/app/member/add-member/component.ts	95.00% <ø> (ø)
src/app/core/module.ts	98.03% <100.00%> (ø)
src/app/member/edit-member/component.ts	95.65% <100.00%> (ø)
src/app/member/member.component.ts	59.82% <100.00%> (+0.34%)	⬆️
src/app/shared/shared.module.ts	100.00% <100.00%> (ø)

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[maciaszczykm]

/retest

[kubermatic-bot]

@maciaszczykm: new pull request created: #3115

In response to this:

/cherrypick release/v2.16
/assign @kgroschoff @floreks

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.