How to Hide WP 2FA - Two-factor authentication for WordPress Admin Menus

function plt_hide_wp_2fa_menus() {
	//Hide "Dashboard →".
	remove_submenu_page('index.php', 'wp-2fa-setup');

	//Hide "WP 2FA".
	remove_menu_page('wp-2fa-policies');
	//Hide "WP 2FA → 2FA Policies".
	remove_submenu_page('wp-2fa-policies', 'wp-2fa-policies');
	//Hide "WP 2FA → Settings".
	remove_submenu_page('wp-2fa-policies', 'wp-2fa-settings');
	//Hide "WP 2FA → Help  Contact Us".
	remove_submenu_page('wp-2fa-policies', 'wp-2fa-help-contact-us');
	//Hide "WP 2FA → Premium Features ➤".
	remove_submenu_page('wp-2fa-policies', 'wp-2fa-premium-features');
}

add_action('admin_menu', 'plt_hide_wp_2fa_menus', 1000);

Where do I put this code?