function plt_hide_password_protected_menus() {
//Hide "Settings → Password Protected".
remove_submenu_page('options-general.php', 'password-protected');
//Hide "Password Protected".
remove_menu_page('password-protected');
//Hide "Password Protected → Password Protected".
remove_submenu_page('password-protected', 'password-protected');
//Hide "Password Protected → ⭐ Get Pro Now".
remove_submenu_page('password-protected', 'password-protected-get-pro');
}
add_action('admin_menu', 'plt_hide_password_protected_menus', 1000000000);