ADX:VNet: remove redundant FQDN

Author: basaba

articles/data-explorer/vnet-deployment.md

@@ -231,7 +231,6 @@ azureprofilerfrontdoor.cloudapp.net:443
 *.core.windows.net:443
 *.servicebus.windows.net:443
 shoebox2.metrics.nsatc.net:443
-production.diagnostics.monitoring.core.windows.net:443
 prod-dsts.dsts.core.windows.net:443
 ocsp.msocsp.com:80
 *.windowsupdate.com:80