Delete LDAP.php

This was properly solved using an autoloader-mapping

lib/SimpleSAML/Auth/LDAP.php

-<?php
-
-namespace SimpleSAML\Auth;
-
-@trigger_error(
-    sprintf('Using the "SimpleSAML\Auth\LDAP" class is deprecated, use "SimpleSAML\Module\ldap\Auth\Ldap" instead.'),
-    E_USER_DEPRECATED
-);
-
-/**
- * @deprecated To be removed in 2.0
- */
-if (class_exists('\SimpleSAML\Module\ldap\Auth\Ldap')) {
-    class LDAP extends \SimpleSAML\Module\ldap\Auth\Ldap
-    {
-        /**
-         * Private constructor restricts instantiation to getInstance().
-         *
-         * @param string $hostname
-         * @param bool $enable_tls
-         * @param bool $debug
-         * @param int $timeout
-         * @param int $port
-         * @param bool $referrals
-         * @psalm-suppress NullArgument
-         */
-        public function __construct(
-            $hostname,
-            $enable_tls = true,
-            $debug = false,
-            $timeout = 0,
-            $port = 389,
-            $referrals = true
-        ) {
-            parent::__construct($hostname, $enable_tls, $debug, $timeout, $port, $referrals);
-        }
-    }
-} else {
-    throw new \Exception('Missing ldap-module');
-}