Remove 'properties' property from ProductAPITemplateResource (#481)

Author: MikeEvansLarah

src/APIM_ARMTemplate/apimtemplate/Common/TemplateModels/ProductAPITemplateResource.cs

@@ -3,8 +3,5 @@ namespace Microsoft.Azure.Management.ApiManagement.ArmTemplates.Common
 {
     public class ProductAPITemplateResource : TemplateResource
     {
-        public ProductAPITemplateProperties properties { get; set; }
     }
-
-    public class ProductAPITemplateProperties { }
 }

src/APIM_ARMTemplate/apimtemplate/Creator/TemplateCreators/ProductAPITemplateCreator.cs

@@ -39,7 +39,6 @@ public ProductAPITemplateResource CreateProductAPITemplateResource(string produc
                 name = $"[concat(parameters('{ParameterNames.ApimServiceName}'), '/{productID}/{apiName}')]",
                 type = ResourceTypeConstants.ProductAPI,
                 apiVersion = GlobalConstants.APIVersion,
-                properties = new ProductAPITemplateProperties(),
                 dependsOn = dependsOn
             };
             return productAPITemplateResource;