How to Hide QuickTasker Admin Menus

function plt_hide_quicktasker_menus() {
	//Hide "QuickTasker".
	remove_menu_page('wp-quick-tasks');
	//Hide "QuickTasker → Boards".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks');
	//Hide "QuickTasker → Overview".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/overview');
	//Hide "QuickTasker → Settings".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/settings');
	//Hide "QuickTasker → Users".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/users');
	//Hide "QuickTasker → Quicktasker sessions".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/user-sessions');
	//Hide "QuickTasker → Archive".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/archive');
	//Hide "QuickTasker → Logs".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/logs');
	//Hide "QuickTasker → Guide".
	remove_submenu_page('wp-quick-tasks', 'wp-quick-tasks#/guide');
}

add_action('admin_menu', 'plt_hide_quicktasker_menus', 11);
Where do I put this code?