Revert "route53: set listHostedZonesByName property"

This reverts commit 07b428f051.

We can just do this in the backend entirely

src/js/setupdns.js

@@ -108,7 +108,6 @@ app.controller('SetupDNSController', ['$scope', '$http', '$timeout', 'Client', f
         if (provider === 'route53') {
             data.accessKeyId = $scope.dnsCredentials.accessKeyId;
             data.secretAccessKey = $scope.dnsCredentials.secretAccessKey;
-            data.listHostedZonesByName = true; // use the new listHostedZoneByName API
         } else if (provider === 'gcdns') {
             try {
                 var serviceAccountKey = JSON.parse($scope.dnsCredentials.gcdnsKey.content);