chore: removes image publishing workflow

[jpower432]

This workflow is no longer used

[jpower432]

@yana1205 Verifying - was this workflow supporting the previous controller implementation?

[yana1205]

@jpower432 Thanks for catching this.
This workflow wasn’t part of the previous controller implementation. It was used to build an image for the cronjob, which collected k8s resources of OCM policies, stored the results, and pushed them to a git repo for an end-to-end demo.
I agree with removing this workflow since there’s no need for it to be a workflow.