[Step 2] mu-wpcom: remove the COLOURLovers Customizer deprecation notice

[Copons]

⚠️ Stacked on #50011 — review/merge that one first. Base is set to the PR1 branch, so this diff shows only the deprecation-notice removal.

Proposed changes

• Remove the wpcom-colourlovers-deprecate feature — the Customizer notice that asked users to update their COLOURLovers background image before the deprecation deadline. COLOURLovers support has been discontinued and the deadline has passed, so the warning is stale. [Step 1] Custom colors: stop serving discontinued COLOURLovers backgrounds #50011 already blanks COLOURLovers backgrounds at render time.
• Deletes the feature's PHP + JS and its loader line in class-jetpack-mu-wpcom.php.

Related product discussion/links

• Related to DOTCOM-1758

Does this pull request change what data or activity we track or use?

No.

Testing instructions

• Build jetpack-mu-wpcom and deploy to an Atomic site.
• On a site that has a COLOURLovers background image set, open the Customizer → confirm the "update your background image" deprecation notice no longer appears.
• Confirm the site loads without errors and function_exists( 'wpcom_colourlovers_deprecate_warning' ) is false.

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WoA dev site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin (WordPress.com Site Helper), and enable the dotcom-1758-remove-colourlovers-deprecate-notice branch.
• To test on Simple, run the following command on your sandbox:

bin/jetpack-downloader test jetpack-mu-wpcom-plugin dotcom-1758-remove-colourlovers-deprecate-notice

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

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[Copilot]

Pull request overview

Removes the now-stale COLOURLovers background deprecation notice feature from jetpack-mu-wpcom, including its PHP/JS implementation and loader hook, and records the removal in the project changelog. This aligns with COLOURLovers support being discontinued and the deadline having passed (with related behavior already handled in stacked PR #50011).

Changes:

• Delete the wpcom-colourlovers-deprecate feature PHP and its Customizer warning script.
• Stop loading the removed feature from Jetpack_Mu_Wpcom::load_wpcom_user_features().
• Add a jetpack-mu-wpcom changelog entry documenting the removal.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
projects/packages/jetpack-mu-wpcom/src/features/wpcom-colourlovers-deprecate/wpcom-colourlovers-deprecate.php	Removes the PHP hook that enqueued/localized the Customizer deprecation warning.
projects/packages/jetpack-mu-wpcom/src/features/wpcom-colourlovers-deprecate/js/colourlovers-deprecated-message.js	Removes the Customizer UI notification logic for the deprecated COLOURLovers background warning.
projects/packages/jetpack-mu-wpcom/src/class-jetpack-mu-wpcom.php	Removes the require_once loader line for the deleted feature.
projects/packages/jetpack-mu-wpcom/changelog/dotcom-1758-remove-colourlovers-deprecate-notice	Adds a changelog entry documenting the removal of the stale Customizer notice.

[jp-launch-control]

Code Coverage Summary

No summary data is available for parent commit 62905de, so cannot calculate coverage changes. 😴

If that commit is a feature branch rather than a trunk commit, this is expected. Otherwise, this should be updated once coverage for 62905de is available.

Full summary · PHP report · JS report