Remove SCA prerequisite (#3570)

Migrating to SCA is a one-time thing and has been a part of the earlier version.
Removing it as it is not required in later versions.

Refs SAT-27580
Refs PR 3228 on GitHub

(cherry picked from commit 83cb759)

guides/common/modules/con_upgrading-prerequisites.adoc

@@ -16,10 +16,7 @@ endif::[]
 For more information, see {AdministeringDocURL}backing-up-{project-context}-server-and-{smart-proxy-context}_admin[Backing Up {ProjectServer} and {SmartProxyServer}] in _{AdministeringDocTitle}_.
 * Plan for updating any scripts you use that contain {Project} API commands because some API commands differ between versions of {Project}.
 ifdef::satellite[]
-* Migrate all organizations to Simple Content Access (SCA).
-For more information, see the Red Hat Knowledgebase solution https://access.redhat.com/articles/simple-content-access[Simple Content Access]. 
-
-Ensure that all {ProjectServer}s are on the same version.
+* Ensure that all {ProjectServer}s are on the same version.
 endif::[]
 
 include::snip_warning-maintain-config-noop.adoc[]