How to Hide WP-ImeemSearch Admin Menus

function plt_hide_imeem_search_plugin_menus() {
	//Hide the "imeemSearch" menu.
	remove_menu_page('imeem-search-plugin/wp-imeem-search.php');
	//Hide the "imeemSearch → Options" menu.
	remove_submenu_page('imeem-search-plugin/wp-imeem-search.php', 'imeem-search-plugin/wp-imeem-search.php');
	//Hide the "imeemSearch → About" menu.
	remove_submenu_page('imeem-search-plugin/wp-imeem-search.php', 'wp-imeem-search-about.php');
}

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

Where do I put this code?