Tips on Customizing Woordle

How to Hide Woordle Admin Menus

function plt_hide_woordle_menus() {
	//Hide "Woordle".
	remove_menu_page('woordle');
	//Hide "Woordle → All Courses".
	remove_submenu_page('woordle', 'edit.php?post_type=courses');
	//Hide "Woordle → All Enrolments".
	remove_submenu_page('woordle', 'edit.php?post_type=enrolment');
	//Hide "Woordle → Course Categories".
	remove_submenu_page('woordle', 'edit-tags.php?taxonomy=category_course');
	//Hide "Woordle → Settings".
	remove_submenu_page('woordle', 'woordle-settings');
}

add_action('admin_menu', 'plt_hide_woordle_menus', 21);

Where do I put this code?

How to Hide the "Enrolment details" Meta Box

function plt_hide_woordle_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Enrolment details" meta box.
	remove_meta_box('woordle_enrol_details', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_woordle_metaboxes', 20);