Remove zone selection limitation

Ability to select zone is now also supported in Portal

Author: thisisanniefang

articles/load-balancer/gateway-overview.md

@@ -76,7 +76,6 @@ For pricing, see [Load Balancer pricing](https://azure.microsoft.com/pricing/det
 * Gateway Load Balancer doesn't work with the Global Load Balancer tier.
 * Cross-tenant chaining isn't supported through the Azure portal.
 * Gateway Load Balancer doesn't currently support IPv6
-* Currently, Gateway Load Balancer frontends configured in Portal will automatically be created as no-zone. To create a zone-redundant frontend, use an alternative client such as ARM/CLI/PS.
 
 ## Next steps