Follow-up fixes for https://github.com/Azure/azure-powershell/pull/13275

src/Resources/ResourceManager/Implementation/ResourceGroups/ExportAzureResourceGroupCmdlet.cs

@@ -37,12 +37,6 @@ namespace Microsoft.Azure.Commands.ResourceManager.Cmdlets.Implementation
     [Cmdlet("Export", ResourceManager.Common.AzureRMConstants.AzureRMPrefix + "ResourceGroup", SupportsShouldProcess = true), OutputType(typeof(PSObject))]
     public class ExportAzureResourceGroupCmdlet : ResourceManagerCmdletBaseWithApiVersion
     {
-        /// <summary>
-        /// Adding a hard-coded API version to be used when there is no value provided for 'ApiVersion' parameter.
-        /// This is a temporary change until we update the cmdlet to use .NET SDK based client.
-        /// </summary>
-        private const string DefaultApiVersion = "2020-06-01";
-
         /// <summary>
         /// Gets or sets the resource group name parameter.
         /// </summary>
@@ -116,9 +110,9 @@ protected override void OnProcessRecord()
 
                 var resourceGroupId = this.GetResourceGroupId();
 
-                if (this.IsParameterBound(c => c.ApiVersion))
+                if (! this.IsParameterBound(c => c.ApiVersion))
                 {
-                    var parameters = new Management.ResourceManager.Models.ExportTemplateRequest
+                    var parameters = new ExportTemplateRequest
                     {
                         Resources = this.GetResourcesFilter(resourceGroupId: resourceGroupId),
                         Options = this.GetExportOptions(),
@@ -147,7 +141,7 @@ protected override void OnProcessRecord()
                         Resources = this.GetResourcesFilter(resourceGroupId: resourceGroupId),
                         Options = this.GetExportOptions(),
                     };
-                    var apiVersion = this.ApiVersion ?? DefaultApiVersion;
+                    var apiVersion = this.ApiVersion;
                     var operationResult = this.GetResourcesClient()
                        .InvokeActionOnResource<JObject>(
                            resourceId: resourceGroupId,