How to Hide Arigato Autoresponder and Newsletter Admin Menus

function plt_hide_bft_autoresponder_menus() {
	//Hide "Arigato Light".
	remove_menu_page('bft_options');
	//Hide "Arigato Light → Settings".
	remove_submenu_page('bft_options', 'bft_options');
	//Hide "Arigato Light → Mailing List".
	remove_submenu_page('bft_options', 'bft_list');
	//Hide "Arigato Light → Import/Export".
	remove_submenu_page('bft_options', 'bft_import');
	//Hide "Arigato Light → Email Messages".
	remove_submenu_page('bft_options', 'bft_messages');
	//Hide "Arigato Light → Send Newsletter".
	remove_submenu_page('bft_options', 'bft_newsletter');
	//Hide "Arigato Light → Raw Email Log".
	remove_submenu_page('bft_options', 'bft_log');
	//Hide "Arigato Light → Webhooks / Zapier".
	remove_submenu_page('bft_options', 'bft_webhooks');
	//Hide "Arigato Light → Help".
	remove_submenu_page('bft_options', 'bft_help');
	//Hide "Arigato Light → Integrate in Contact Form".
	remove_submenu_page('bft_options', 'bft_integrate_contact');
}

add_action('admin_menu', 'plt_hide_bft_autoresponder_menus', 11);
Where do I put this code?