How to Hide Coming Soon Page & Maintenance Mode by SeedProd Admin Menus

function plt_hide_coming_soon_menus() {
	//Hide "SeedProd".
	remove_menu_page('seed_csp4');
	//Hide "SeedProd → Settings".
	remove_submenu_page('seed_csp4', 'seed_csp4');
	//Hide "SeedProd → Themes".
	remove_submenu_page('seed_csp4', 'seed_csp4_themes');
	//Hide "SeedProd → Free Stock Images".
	remove_submenu_page('seed_csp4', 'seed_csp4_stockimages');
	//Hide "SeedProd → Subscribers".
	remove_submenu_page('seed_csp4', 'seed_csp4_subscribers');
	//Hide "SeedProd → Addons".
	remove_submenu_page('seed_csp4', 'seed_csp4_addons');
}

add_action('admin_menu', 'plt_hide_coming_soon_menus', 11);

Where do I put this code?