How to Hide Rank Tracker - SEO Monitoring, Google Rank Tracking, Easy SEO Tracker, Keyword Rank Tracking Admin Menus

function plt_hide_easy_rank_tracker_menus() {
	//Hide "Rank Tracker".
	remove_menu_page('wp-rank-tracker');
	//Hide "Rank Tracker → Keywords".
	remove_submenu_page('wp-rank-tracker', 'wp-rank-tracker');
	//Hide "Rank Tracker → Settings".
	remove_submenu_page('wp-rank-tracker', 'wp-rank-tracker-settings');
	//Hide "Rank Tracker → Get Premium".
	remove_submenu_page('wp-rank-tracker', 'wp-rank-tracker-premium');
}

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

Where do I put this code?