How to Hide MagicPost Admin Menus

function plt_hide_magicpost_menus() {
	//Hide "MagicPost".
	remove_menu_page('magicpost');
	//Hide "MagicPost → Scheduled Posts".
	remove_submenu_page('magicpost', 'magicpost#/schedule');
	//Hide "MagicPost → Post Migration".
	remove_submenu_page('magicpost', 'magicpost#/move');
	//Hide "MagicPost → Post Translation".
	remove_submenu_page('magicpost', 'magicpost#/translate');
	//Hide "MagicPost → HTML Cleanup".
	remove_submenu_page('magicpost', 'magicpost#/clean');
	//Hide "MagicPost → Download Management".
	remove_submenu_page('magicpost', 'magicpost#/download');
	//Hide "MagicPost → Social Share".
	remove_submenu_page('magicpost', 'magicpost#/share');
	//Hide "MagicPost → Table of Contents".
	remove_submenu_page('magicpost', 'magicpost#/toc');
	//Hide "MagicPost → Editor Enhancements".
	remove_submenu_page('magicpost', 'magicpost#/enhance');
	//Hide "MagicPost → Settings".
	remove_submenu_page('magicpost', 'magicpost#/home');
	//Hide "MagicPost → Upgrade to Pro".
	remove_submenu_page('magicpost', 'http://127.0.0.1/wp-admin/admin.php?page=magicpost#/pro');
}

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