How to Hide Pattern Wrangler Admin Menus

function plt_hide_pattern_wrangler_menus() {
	//Hide "Patterns".
	remove_menu_page('pattern-wrangler-view');
	//Hide "Patterns → All Patterns".
	remove_submenu_page('pattern-wrangler-view', 'pattern-wrangler-view');
	//Hide "Patterns → Categories".
	remove_submenu_page('pattern-wrangler-view', 'pattern-wrangler-categories-view');
	//Hide "Patterns → Settings".
	remove_submenu_page('pattern-wrangler-view', 'pattern-wrangler');
}

add_action('admin_menu', 'plt_hide_pattern_wrangler_menus', 101);

Where do I put this code?