Remove content moved to Sysadmin Guide
Created by: seancolsen
After looking at #265 (closed) I went looking for other instances of the same thing and found this one.
I moved this content to the Sysadmin Guide a while back and forgot to delete it from the User Guide. Whoops!
Proof that we're not loosing anything: https://docs.civicrm.org/sysadmin/en/latest/setup/#civicrm-system-status