How to Hide Reviews Feed Admin Menus

function plt_hide_reviews_feed_menus() {
	//Hide "Reviews Feed".
	remove_menu_page('sbr');
	//Hide "Reviews Feed → All Feeds".
	remove_submenu_page('sbr', 'sbr');
	//Hide "Reviews Feed → CollectionsPRO".
	remove_submenu_page('sbr', 'sbr-collections');
	//Hide "Reviews Feed → Settings".
	remove_submenu_page('sbr', 'sbr-settings');
	//Hide "Reviews Feed → About us".
	remove_submenu_page('sbr', 'sbr-about');
	//Hide "Reviews Feed → Support".
	remove_submenu_page('sbr', 'sbr-support');
	//Hide "Reviews Feed → Upgrade to Pro".
	remove_submenu_page('sbr', 'https://smashballoon.com/reviews-feed/?utm_campaign=reviews-free&utm_source=menu-link&utm_medium=upgrade-link&utm_content=UpgradeToPro');
}

add_action('admin_menu', 'plt_hide_reviews_feed_menus', 41);
Where do I put this code?