How to Hide Activity Log Admin Menus

function plt_hide_aryo_activity_log_menus() {
	//Hide the "Activity Log" menu.
	remove_menu_page('activity-log-page');
	//Hide the "Activity Log → Activity Log" menu.
	remove_submenu_page('activity-log-page', 'activity-log-page');
	//Hide the "Activity Log → Settings" menu.
	remove_submenu_page('activity-log-page', 'activity-log-settings');
}

add_action('admin_menu', 'plt_hide_aryo_activity_log_menus', 31);

Where do I put this code?