wp-includes/class-wp-post-type.php:833Unregisters the post type meta box if a custom callback was specified.
public function unregister_meta_boxes() { if ( $this->register_meta_box_cb ) { remove_action( 'add_meta_boxes_' . $this->name, $this->register_meta_box_cb, 10 ); } }Introduced in 4.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-post-type.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.