Removed "Step 4." From Heading (#146)

No other heading on this page is numbered; possibly a copy/paste from the previous section?
Removed the numbering from this heading so it doesn't look like we forgot to add three other steps ;-)

docs/modules/ROOT/pages/deploy-management-center.adoc

@@ -174,7 +174,7 @@ MANCENTER_IP=$( oc get service managementcenter-sample -o jsonpath='{.status.loa
 --
 ====
 
-== Step 4. Clean up
+== Clean up
 
 You can run the commands below to remove the Management Center.