Pattern Creator: Print stylesheet depends on a deregistered parent stylesheet #798

The front-end pattern creator displays this PHP notice when debugging is enabled:

The style with the handle "wporg-parent-2021-print" was enqueued with dependencies that are not registered: wporg-parent-2021-style.

The creator deregisters the parent theme’s main stylesheet but leaves its dependent print stylesheet registered.

To Reproduce

1. Run the Pattern Directory locally with the wporg-parent-2021 parent theme.
2. Enable WP_DEBUG and WP_DEBUG_DISPLAY.
3. Log in and visit /new-pattern/.
4. Observe the PHP notice above the editor.

Expected behavior

The pattern creator loads without stylesheet dependency notices.

Screenshots

The notice text is included above.

Desktop

• OS: macOS
• Browser: Chrome 155.0.8059.85

Additional context

Reproduced with WordPress 7.2-beta1-64675 and PHP 8.4.

This can be fixed by deregistering the print stylesheet alongside the parent theme’s main stylesheet in pattern_creator_init():

wp_deregister_style( 'wporg-parent-2021-print' );
wp_deregister_style( 'wporg-parent-2021-style' );