Revert "OCPBUGS-10304: Document oc-mirror command for creating ImageContentSou…"

[bergerhoffer]

Reverts #63332

[openshift-ci-robot]

@bergerhoffer: This pull request references Jira Issue OCPBUGS-10304, which is invalid:

• expected the bug to target only the "4.15.0" version, but multiple target versions were set
• expected the bug to be in one of the following states: NEW, ASSIGNED, POST, but it is Verified instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

Reverts #63332

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ocpdocs-previewbot]

🤖 Build preview is available at:
https://66043--docspreview.netlify.app

Build log: https://circleci.com/gh/ocpdocs-previewbot/openshift-docs/27333

[bergerhoffer]

I can see from the preview that this removes the formatting issues, and the build warnings are gone. Merging

[openshift-ci-robot]

@bergerhoffer: Jira Issue OCPBUGS-10304 is in an unrecognized state (Verified) and will not be moved to the MODIFIED state.

In response to this:

Reverts #63332

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.