Remove the WooCommerce Subscriptions reports from the admin reports panel.

wcs-disable-all-subscription-reports.php

<?php
/**
 * Plugin Name: WooCommerce Subscriptions - Disable All Subscription Reports
 * Plugin URI:
 * Description: Remove the WooCommerce Subscriptions reports from the admin reports panel.
 * Author: Prospress Inc.
 * Author URI: http://prospress.com/
 * Version: 1.0
 *
 * Copyright 2016 Prospress, Inc.  (email : [email protected])
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @package		WooCommerce Subscriptions
 * @author		Prospress Inc.
 * @since		1.0
 */

add_action( 'plugins_loaded', 'wcs_remove_all_subscription_reports', 12 );

function wcs_remove_all_subscription_reports() {
	remove_filter( 'woocommerce_admin_reports', 'WCS_Admin_Reports::initialize_reports', 12 );
}