Connection: remove deprecated code from connected plugins component

[sergeymitr]

Proposed changes:

• Remove the long deprecated remains of the "soft disconnect" functionality which hasn't been in use since 2022.

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

p9dueE-4n9-p2

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

No.

Testing instructions:

1. Connect Jetpack. Check Jetpack Debugger, confirm Jetpack shows up in the list of active Jetpack plugins.
2. Install a standalone Jetpack plugin. Check the Debugger, confirm it shows up as well.
3. Deactivate that another Jetpack plugin. Confirm it disappears from the list in Debugger, and Jetpack is still connected.
4. Deactivate Jetpack, activate it again. Confirm it's been disconnected and needs to be reconnected.

[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/deprecated-disable-plugin-connection branch.

  • For jetpack-mu-wpcom changes, also add define( 'JETPACK_MU_WPCOM_LOAD_VIA_BETA_PLUGIN', true ); to your wp-config.php file.

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

  bin/jetpack-downloader test jetpack remove/deprecated-disable-plugin-connection
  

  bin/jetpack-downloader test jetpack-mu-wpcom-plugin remove/deprecated-disable-plugin-connection
  

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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[anomiex]

Removing deprecated code probably should be major. If someone was still calling these functions somewhere, it'd break them.

[sergeymitr]

Those functions were mostly internal, never supposed to be called outside of Connection's Manager and maybe Config.
Also, it's been quite a while 🙂

[anomiex]

If they were never part of the API of the package, then it's ok. 🙂

Usually we don't do too well at defining what's part of the public API of the package, and what's accessible but internal. 🙂