functions.php
/**
* 不要なメタタグを削除
*/
remove_action('wp_head', 'wp_generator');
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'index_rel_link');
remove_action('wp_head', 'start_post_rel_link');
remove_action('wp_head', 'parent_post_rel_link');
remove_action('wp_head', 'adjacent_posts_rel_link');