Delete order notes (and related meta) when wiping all the data on uninstall

[eri-trabiccolo]

Reproduction Steps

• create an order
• add, e.g., define( 'LLMS_REMOVE_ALL_DATA', true ); to your wp-config.php
• uninstall and delete LifterLMS
• check the comments and commentmeta table in the db.

Expected Behavior

• I'd expect to see no llms_order_note comment types and meta relative to those notes.

Actual Behavior

• llms_order_note comment types and meta relative to those notes are still there

Error Messages / Logs

n/a

System and Environment Information

LifterLMS 7.0.1

This issue has be recreated:

• [x] Locally
• [ ] On a staging site
• [ ] On a production website
• [x] With only LifterLMS and a default theme

Browser, Device, and Operating System Information

n/a

[actuallyakash]

Hey @eri-trabiccolo,

I've added the WPDB delete query to delete the data which have a llms_order_note comment_type. Let me know, if anything needs to be changed in the PR. Thanks!

[eri-trabiccolo]

@actuallyakash I think that the proposed PR doesn't remove the comments meta. See as reference, what WooCommerce does, we should do basically the same thing with our order notes. https://github.com/woocommerce/woocommerce/blob/012a8b4655d52ba5a18f6cb787b29a6fd50e73f0/plugins/woocommerce/uninstall.php#L73-L74

[actuallyakash]

@eri-trabiccolo

Just pushed another commit. Thanks for your suggestions.

The queries are working fine, tested manually.