example conf: Remove unused amf section

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>

conf/corosync.conf.example

@@ -75,7 +75,3 @@ logging {
 		debug: off
 	}
 }
-
-amf {
-	mode: disabled
-}