Remove system folder rewrite from .htaccess if it's above root

[stinhambo]

Suggested Change I suggest letting the user know they can remove the system folder rewrite line from .htaccess if it's not URL accessible (above root) whether they've renamed the system folder or not.

Reasoning Because there are exceptions for all scenarios bar this one and it caused me to wonder if something was missing from docs because I'd renamed the system folder.

Additional context None