Remove the old tekton version

[juliusvonkohout]

Validation Checklist

• Is this a Kubeflow issue?
• Are you posting in the right repository ?
• Did you follow the installation guide https://github.com/kubeflow/manifests?tab=readme-ov-file ?
• Is the issue report properly structured and detailed with version numbers?
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Version

master

Describe your issue

Check from the main readme
Kubeflow Tekton Pipelines apps/kfp-tekton/upstream [2.0.5](https://github.com/kubeflow/kfp-tekton/tree/2.0.5

and the folder /https://github.com/kubeflow/manifests/tree/master/apps/kfp-tekton/upstream

both must be deleted since they have been merged into KFP.

@rimolive

We should also delete https://github.com/kubeflow/manifests/blob/master/.github/issue_label_bot.yaml

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[juliusvonkohout]

/lifecycle frozen