doc: server configuration: remove outdated screencast

- ref. shaarli#2002
- uses old instructions/mod-php instead of the now recommended php-fpm
- server configuration may not be the ideal page for this, installation would be more suitable

doc/md/Server-configuration.md

@@ -25,13 +25,6 @@ Setup a **firewall** (using `iptables`, [ufw](https://www.digitalocean.com/commu
 
 Shaarli makes outbound HTTP/HTTPS connections to websites you bookmark to fetch page information (title, thumbnails), the server must then have access to the Internet as well, and a working DNS resolver.
 
-
-### Screencast
-
-Here is a screencast of the installation procedure
-
-[![asciicast](https://asciinema.org/a/z3RXxcJIRgWk0jM2ws6EnUFgO.svg)](https://asciinema.org/a/z3RXxcJIRgWk0jM2ws6EnUFgO)
-
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 ### PHP