How to Hide YOP Poll Admin Menus

function plt_hide_yop_poll_menus() {
	//Hide "Yop Poll".
	remove_menu_page('yop-polls');
	//Hide "Yop Poll → All Polls".
	remove_submenu_page('yop-polls', 'yop-polls');
	//Hide "Yop Poll → Add New".
	remove_submenu_page('yop-polls', 'yop-poll-add-poll');
	//Hide "Yop Poll → Bans".
	remove_submenu_page('yop-polls', 'yop-poll-bans');
	//Hide "Yop Poll → Logs".
	remove_submenu_page('yop-polls', 'yop-poll-logs');
	//Hide "Yop Poll → Settings".
	remove_submenu_page('yop-polls', 'yop-poll-settings');
	//Hide "Yop Poll → Upgrade to Pro".
	remove_submenu_page('yop-polls', 'yop-poll-upgrade-to-pro');
}

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

Where do I put this code?