Remove `scrollable/highlights` container layout definition for frontend

[cemms1]

What is the value of this and can you measure success?

When a front falls back to frontend instead of DCR, we're getting some wacky layouts for scrollable/highlights. Ideally we wouldn't render this container at all but as a first step we can let it fall back to displaying as a fixed/slow/small-iv container as with other containers without definitions.

What does this change?

Removes the layout definition for the scrollable/highlights container and lets it fall back to the default value instead (fixed-4)

Screenshots

Checklist

• [ ] Tested locally, and on CODE if necessary
• [ ] Will not break dotcom-rendering
• [ ] Will not break our database – if updating CAPI, updated and committed the database files
• [ ] Meets our accessibility standards
  • [ ] Tested with screen reader
  • [ ] Navigable with keyboard
  • [ ] Colour contrast passed

[github-actions[bot]]

Deploy build 3026 of dotcom:frontend-all to CODE

All deployment options

- [Deploy build 3026 of `dotcom:frontend-all` to CODE](https://riffraff.gutools.co.uk/deployment/deployAgain?project=dotcom%3Afrontend-all&build=3026&stage=CODE&updateStrategy=MostlyHarmless&action=deploy) - [Deploy parts of build 3026 to CODE by previewing it first](https://riffraff.gutools.co.uk/preview/yaml?project=dotcom%3Afrontend-all&build=3026&stage=CODE&updateStrategy=MostlyHarmless) - [What's on CODE right now?](https://riffraff.gutools.co.uk/deployment/history?projectName=dotcom%3Afrontend-all&stage=CODE)

---

From guardian/actions-riff-raff.

[github-actions[bot]]

"This PR is stale because it has been open 30 days with no activity. Unless a comment is added or the “stale” label removed, this will be closed in 3 days"

[github-actions[bot]]

This PR was closed because it has been stalled for 3 days with no activity.