Fix for Travis

docs/third_party-rainloop.md

@@ -1,19 +0,0 @@
-1\. Create a new subdirectory for rainloop and download the RainLoop installer:
-```
-mkdir data/web/rainloop
-curl -o data/web/rainloop/installer.php -s http://repository.rainloop.net/installer.php
-```
-
-2\. Run the installert from within the PHP-FPM mailcow container and delete the installer:
-```
-docker exec -it $(docker ps -qf name=php-fpm-mailcow) php /web/rainloop/installer.php
-rm data/web/rainloop/installer.php
-```
-
-3\. Login to `${MAILCOW_HOSTNAME}/rainloop/?admin` to set a password. The default credentials are `admin`:`12345`.
-
-Add and configure a new domain as you need. Use "dovecot" as IMAP server name and "postfix" as SMTP server name.
-
-![Screenshot1](https://i.imgur.com/yz0A3dT.png)
-
-![Screenshot2](https://i.imgur.com/m1riawB.png)