Turn off default core block patterns

.bat

wp scaffold child-theme youtube-video --parent_theme=twentytwentythree

disable-open-verse.php

add_filter(
  'block_editor_settings_all',
  function( $settings ) {
    $settings['enableOpenverseMediaCategory'] = false;
    return $settings;
  },
  10
);

functions.php

if ( ! function_exists( 'custom_setup' ) ) {

	/**
	 * Sets up theme defaults and registers support for various WordPress features.
	 *
	 * Note that this function is hooked into the after_setup_theme hook, which
	 * runs before the init hook. The init hook is too late for some features, such
	 * as indicating support for post thumbnails.
	 *
	 * @since 0.8.0
	 *
	 * @return void
	 */
	function custom_setup() {

		// Remove core block patterns.
		remove_theme_support( 'core-block-patterns' );
	}
}
add_action( 'after_setup_theme', 'custom_setup' );