How to Hide Better Posts Plus Admin Menus

function plt_hide_better_posts_plus_menus() {
	//Hide "Better Posts+ Reorder your blog!".
	remove_menu_page('rp_aimweb_menu');
	//Hide "Better Posts+ Reorder your blog! → Better Posts+ Reorder your blog!".
	remove_submenu_page('rp_aimweb_menu', 'rp_aimweb_menu');
	//Hide "Better Posts+ Reorder your blog! → Settings".
	remove_submenu_page('rp_aimweb_menu', 'rp_aimweb_menu_settings');
	//Hide "Better Posts+ Reorder your blog! → Restore defaults".
	remove_submenu_page('rp_aimweb_menu', 'rp_aimweb_reset');
}

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

Where do I put this code?