restore environment/__init__.php to open source version

Summary:sorry about that.

Reviewers:

Test Plan:

Task ID:

WebDriverEnvironment.php

@@ -20,6 +20,6 @@
 
 final class WebDriverEnvironment {
   public static function CurlExec($ch) {
-    return curl_exec_internal_DEPRECATED($ch);
+    return curl_exec($ch);
   }
 }

__init__.php

@@ -1,13 +1,23 @@
 <?php
 // Copyright 2004-present Facebook. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
-require_module('http/curl');
-
-require_source('WebDriverBase.php');
-require_source('WebDriver.php');
-require_source('WebDriverContainer.php');
-require_source('WebDriverSession.php');
-require_source('WebDriverElement.php');
-require_source('WebDriverEnvironment.php');
-require_source('WebDriverExceptions.php');
-require_source('WebDriverSimpleItem.php');
+require_once('WebDriverBase.php');
+require_once('WebDriver.php');
+require_once('WebDriverContainer.php');
+require_once('WebDriverSession.php');
+require_once('WebDriverElement.php');
+require_once('WebDriverEnvironment.php');
+require_once('WebDriverExceptions.php');
+require_once('WebDriverSimpleItem.php');