How to Hide SiteAssist AI Editorial Planner Admin Menus

function plt_hide_siteassist_ai_editorial_planner_menus() {
	//Hide the "AI Planner" menu.
	remove_menu_page('siteassist-ai-editorial-planner');
	//Hide the "AI Planner → AI Planner" menu.
	remove_submenu_page('siteassist-ai-editorial-planner', 'siteassist-ai-editorial-planner');
	//Hide the "AI Planner → Get Pro Bundle" menu.
	remove_submenu_page('siteassist-ai-editorial-planner', 'wpaep-get-pro-bundle');
}

add_action('admin_menu', 'plt_hide_siteassist_ai_editorial_planner_menus', 1000000000);

Where do I put this code?