[release-1.10] Remove unused multi-tenancy creds

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #3797

/assign mboersma

NONE

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (3f1dd4e) 54.05% compared to head (e7c23d2) 54.05%.
Report is 1 commits behind head on release-1.10.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-1.10    #3801   +/-   ##
=============================================
  Coverage         54.05%   54.05%           
=============================================
  Files               186      186           
  Lines             18833    18833           
=============================================
  Hits              10181    10181           
  Misses             8105     8105           
  Partials            547      547           

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[mboersma]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 28c99bbe69fc2c3c7040346b18a0c5a4abca4978

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mboersma

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