Fix warning on deprecated ROS release notes.

[kscottz]

Description

@keithkirkwood-3di at 3Di is reporting a new warning that is blocking them. I don't have a good sense of the root cause of the warning but the offending line doesn't seem like it is necessary and the warning only appears on deprecated releases so I am pretty sure it can be safely removed.

Fixes # (issue)

Did you use Generative AI?

No.

Additional Information

If this doesn't work feel free to close the PR.

[fujitatomoya]

@kscottz thank for trying to address the warnings. this PR surely addresses the

the test is still failing, this is found by "reference:any" errors, which are found in #6892 (comment).

the another one is tricky though.
docs.ros.org is now behind Anubis anti-bot protection. when sphinx.ext.intersphinx tries to fetch the 7 objects.inv inventory files, the server returned an HTML "Making sure you're not a bot!" challenge page instead of a real inventory, producing 7 warnings. since Makefile builds with -W (warnings-as-errors), the build aborted.
this is an external infrastructure change (Anubis), not a docs PR.

i think it would be okay to remove those mappings, because they are not used except python. i will add the fix on this.

[fujitatomoya]

@kscottz i can only approve your fix. can you do the same for mine?

[github-actions]

HTML artifacts: https://github.com/ros2/ros2_documentation/actions/runs/27921622522/artifacts/7780599095.

To view the resulting site:

1. Click on the above link to download the artifacts archive
2. Extract it
3. Open html-artifacts-6907/index.html in your favorite browser

[fujitatomoya]

now all workflows should pass.

[kscottz]

.@fujitatomoya thanks! Which PR do you need a review / approval on? I didn't see anything in the queue.

Is it just a matter of updating form http to https in the conf file?

[fujitatomoya]

ah sorry, i was just asking if my fix in this PR looks good to you.

[kscottz]

@fujitatomoya thanks. Let me yank those files and see if we can't get CI green.

[kscottz]

This all looks good to me.

@christophebedard @ahcorde can you take a look?

@keithkirkwood-3di this PR should fix your CI issues. Once it is merged pull from rolling and CI should go green.