Hide admin menu items and subitems

gistfile1.txt

/**
 * Hide admin menu items. Can be both parents and children in dropdowns.
 * Specify link to parent and link to child.
 * @link https://codex.wordpress.org/Function_Reference/remove_menu_page
 */
 
add_action( 'admin_menu', function () { 
  // Remove Settings
  remove_menu_page( 'options-general.php' );
  // Remove Settings -> Writing
  remove_submenu_page( 'options-general.php', 'options-writing.php' );
  // Remove Settings -> Reading
  remove_submenu_page( 'options-general.php', 'options-reading.php' );
  // Remove Settings -> Discussion
  remove_submenu_page( 'options-general.php', 'options-discussion.php' );
  // Remove Settings -> Media
  remove_submenu_page( 'options-general.php', 'options-media.php' );
  // Remove Settings -> Permalinks
  remove_submenu_page( 'options-general.php', 'options-permalink.php' );
  // Remove Plugins
  remove_menu_page( 'plugins.php' );
  // Remove Yoast
  remove_menu_page( 'wpseo_dashboard' );
}, 999);