Portenta X8: FoundriesFactory: Remove misleading information

We don't perform automatic factory registration for the Arduino
factories so remove this information.

Signed-off-by: Vanessa Maegima <vanessa.maegima@foundries.io>

Author: vanmaegima

content/hardware/04.pro/boards/portenta-x8/tutorials/x8-fundamentals/portenta-x8-fundamentals.md

@@ -39,7 +39,7 @@ A ready-made Linux distribution that packages everything seems most attractive f
 
 Foundries.io™ basically created their generic-but-not-too-generic distribution based on Yocto with minimal software installed, by default implementing top level cybersecurity features like OP-TEE and OSTREE that makes their solution ideal for professional applications. A custom OTA system update mechanism which is based on a client running on target and a robust cloud server. And they married Docker-compose as a way to deploy a software solution to a target. This is like having an app store for a particular device with the difference that we're not installing an app but a container which may contain a whole distribution or a minimal distribution running only our app or our set of apps.
 
-In addition to that they developed the cloud side as well. In a nutshell you can use what's called FoundriesFactory, a cloud DevSecOps subscription service to build, test, deploy, and maintain secure, updatable IoT and Edge products. It provides a unique id and automatic builds of the base system and containers for this system in one place. When you flash a device (i.e. Portenta X8 board) with their image and connect it to the Internet it automatically registers itself, generating a random RSA key to your Factory. Let's now take a look at the Foundries.io Factory page.
+In addition to that they developed the cloud side as well. In a nutshell you can use what's called FoundriesFactory, a cloud DevSecOps subscription service to build, test, deploy, and maintain secure, updatable IoT and Edge products. It provides a unique id and automatic builds of the base system and containers for this system in one place. Let's now take a look at the Foundries.io Factory page.
 
 ### Foundries.io Factory