Abandon google-fonts-provider package

[anomiex]

Proposed changes:

The google-fonts-provider package made use of APIs that were provided by the Gutenberg plugin versions v12.8.0 to v16.3.0 and never made it into WordPress Core.

Meanwhile, the google-fonts module in the Jetpack plugin has been updated to use an API that was included in WordPress Core 6.4, which is the minimum version we support.

So let's abandon the package, and remove the back-compat code in the Jetpack plugin that used it.

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

p1719259393606879-slack-CBG1CP4EN

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

No

Testing instructions:

• Downgrade WordPress to 6.4 (which is the earliest Jetpack supports).
• Make sure the Google Fonts module still works, see https://jetpack.com/support/google-fonts/ for details.

[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 WordPress.com Simple 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, and enable the remove/abandon-google-fonts-provider-package branch.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack remove/abandon-google-fonts-provider-package
  

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]

Thank you for your PR!

When contributing to Jetpack, we have a few suggestions that can help us test and review your patch:

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• ✅ Add a "[Status]" label (In Progress, Needs Team Review, ...).
  
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• ✅ Add changelog entries to affected projects
  

This comment will be updated as you work on your PR and make changes. If you think that some of those checks are not needed for your PR, please explain why you think so. Thanks for cooperation 🤖

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The e2e test report can be found here. Please note that it can take a few minutes after the e2e tests checks are complete for the report to be available.

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Once your PR is ready for review, check one last time that all required checks appearing at the bottom of this PR are passing or skipped.
Then, add the "[Status] Needs Team Review" label and ask someone from your team review the code. Once reviewed, it can then be merged.
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Jetpack plugin:

The Jetpack plugin has different release cadences depending on the platform:

• WordPress.com Simple releases happen daily.
• WoA releases happen weekly.
• Releases to self-hosted sites happen monthly. The next release is scheduled for July 2, 2024 (scheduled code freeze on July 1, 2024).

If you have any questions about the release process, please ask in the #jetpack-releases channel on Slack.

[tbradsha]

Looks good. No errors after downgrading to WP 6.4 and enabling the module.