Remove unused ServiceController.loadBalancerName method

[timoreimann]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
Remove unused ServiceController.loadBalancerName method

Its only caller lives in the corresponding test file. Hence, we move the method called by loadBalancerName over to the test and remove loadBalancerName.

Does this PR introduce a user-facing change?:
No.

NONE

/sig cloud-provider

[k8s-ci-robot]

Hi @timoreimann. Thanks for your PR.

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[yue9944882]

/ok-to-test

[yue9944882]

/cc @freehan @cheftako

[vllry]

/lgtm
/assign @thockin

[thockin]

Thanks!

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: thockin, timoreimann

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