Revert "Add documentation for sending emails with Symfony on GAE"

This reverts commit bc21814.

Author: Administrator

appengine/php72/symfony-framework/README.md

@@ -265,76 +265,12 @@ the [Stackdriver Error Reporting UI][stackdriver-errorreporting-ui]! If you copi
 `https://YOUR_PROJECT_ID.appspot.com/en/logging/notice` and
 `https://YOUR_PROJECT_ID.appspot.com/en/logging/exception`
 
-## Send emails
-
-As stated in the [Migration guide from PHP 5.x to 7.x][cloud-migration] the Mail API or App Engine has been removed.
-The recommended way to send emails is to use a third-party mail provider such as [Sendgrid][sendgrid], [Mailgun][mailgun] or [Mailjet][mailjet]. 
-Hosting your application on GAE, most of these providers will offer you up to 30,000 emails per month and you will be charged only if you send more.
-You will have the possibility to track your email delivery and benefit from all the feature of a real email broadcasting system.
-
-### Install
-
-First you need to install the mailer component:
-
-```
-composer require symfony/mailer
-```
-
-Then depending on the provider you chose, you need to add the additional component, [Symfony mailer documentation][symfony-mailer]
-will give you all the specific per provider but here is an example with Mailgun:
-
-```
-composer require symfony/mailgun-mailer
-```
-
-This recipe will automatically add the following ENV variable to your .env file:
-
-```
-# Will be provided by mailgun once your account will be created
-MAILGUN_KEY= xxxxxx
-# Should be your Mailgun MX record
-MAILGUN_DOMAIN= mg.yourdomain.com
-# Region is mandatory if you chose server outside the US otherwise your domain will not be found
-MAILER_DSN=mailgun://$MAILGUN_KEY:$MAILGUN_DOMAIN@default?region=eu
-```
-
-From that point, you just need to create your account and first domain adding all the DNS Records.
-[Mailgun documentation][mailgun-add-domain] will lead you through these steps.
-
-You can now send emails in Controller and Service as usual:
-```
-// src/Controller/MailerController.php
-namespace App\Controller;
-
-use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
-use Symfony\Component\Mailer\MailerInterface;
-use Symfony\Component\Mime\Email;
-
-class MailerController extends AbstractController
-{
-    /**
-     * @Route("/email")
-     */
-    public function sendEmail(MailerInterface $mailer)
-    {
-        $email = (new Email())
-            ->from('[email protected]')
-            ->to('[email protected]')
-            ->subject('Time for Symfony Mailer!')
-            ->text('Sending emails is fun again!');
-
-        $mailer->send($email);
-    }
-} 
-```
-
 [cloud-sdk]: https://cloud.google.com/sdk/
 [cloud-build]: https://cloud.google.com/cloud-build/
 [cloud-sql]: https://cloud.google.com/sql/docs/
 [cloud-sql-create]: https://cloud.google.com/sql/docs/mysql/create-instance
 [cloud-sql-install]: https://cloud.google.com/sql/docs/mysql/connect-external-app#install
-[cloud-sql-apis]: https://console.cloud.google.com/apis/library/sqladmin.googleapis.com/?pro
-[cloud-migration]: https://cloud.google.com/appengine/docs/standard/php7/php-differences?hl=en#migrating_from_the_app_engine_php_sdk
+[cloud-sql-apis]:https://console.cloud.google.com/apis/library/sqladmin.googleapis.com/?pro
 [create-project]: https://cloud.google.com/resource-manager/docs/creating-managing-projects
 [enable-billing]: https://support.google.com/cloud/answer/6293499?hl=en
 [symfony]: http://symfony.com
@@ -344,10 +280,5 @@ class MailerController extends AbstractController
 [symfony-secret]: http://symfony.com/doc/current/reference/configuration/framework.html#secret
 [symfony-env]: https://symfony.com/doc/current/configuration/environments.html#executing-an-application-in-different-environments
 [symfony-override-cache]: https://symfony.com/doc/current/configuration/override_dir_structure.html#override-the-cache-directory
-[symfony-mailer]: https://symfony.com/doc/current/mailer.html
 [stackdriver-logging-ui]: https://console.cloud.google.com/logs
 [stackdriver-errorreporting-ui]: https://console.cloud.google.com/errors
-[sendgrid]: https://sendgrid.com/
-[mailgun]: https://www.mailgun.com/
-[mailjet]: https://www.mailjet.com/
-[mailgun-add-domain]: https://help.mailgun.com/hc/en-us/articles/203637190-How-Do-I-Add-or-Delete-a-Domain-