打开主题 functions.php 文件,添加如下代码

function coolwp_remove_open_sans_from_wp_core() {
    wp_deregister_style( 'open-sans' );
    wp_register_style( 'open-sans', false );
    wp_enqueue_style('open-sans','');
}
add_action( 'init', 'coolwp_remove_open_sans_from_wp_core' );