How to Hide the "Courses Table" Admin Menu

function plt_hide_ab_courses_table_for_tutor_lms_menus() {
	//Hide the "Settings → Courses Table" menu.
	remove_submenu_page('options-general.php', 'abct-settings');
}

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

Where do I put this code?