remove extra break

src/setupdns.html

@@ -63,7 +63,6 @@
                         </div>
                         <div class="row">
                             <div class="col-md-10 col-md-offset-1">
-                                <br/>
                                 <div class="form-group" style="margin-bottom: 0;" ng-class="{ 'has-error': dnsCredentialsForm.domain.$dirty && dnsCredentialsForm.domain.$invalid }">
                                     <label class="control-label">Domain  <sup><a href="https://cloudron.io/documentation/installation/#domain-setup" class="help" target="_blank"><i class="fa fa-question-circle"></i></a></sup></label>
                                     <input type="text" class="form-control" ng-model="dnsCredentials.domain" name="domain" placeholder="example.com" required autofocus ng-disabled="dnsCredentials.busy">