Removed etcd reference

Author: Shubha Narayanan

modules/installation-aws-user-infra-requirements.adoc

@@ -162,10 +162,6 @@ within the cluster.
 |`AWS::Route53::HostedZone`
 |The hosted zone for your internal DNS.
 
-|etcd record sets
-|`AWS::Route53::RecordSet`
-|The registration records for etcd for your control plane machines.
-
 |Public load balancer
 |`AWS::ElasticLoadBalancingV2::LoadBalancer`
 |The load balancer for your public subnets.