[QE] Removing deprecated code from test/upgrade

[cardil]

Fixes #5554

Proposed Changes

• 🧹 Clean up deprecated code from test/upgrade package

[cardil]

/cc @zhongduo

I'm removing deprecated code - you probably will need to adjust if not done it already

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In response to this:

/cc @zhongduo

I'm removing deprecated code - you probably will need to adjust if not done it already

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[codecov]

Codecov Report

Merging #5555 (a1e9deb) into main (14ae489) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #5555   +/-   ##
=======================================
  Coverage   82.62%   82.62%           
=======================================
  Files         198      198           
  Lines        6153     6153           
=======================================
  Hits         5084     5084           
  Misses        742      742           
  Partials      327      327           

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[matzew]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cardil, matzew

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