Restore azurerm_nginx_configuration resource and data source

internal/services/nginx/nginx_configuration_data_source_test.go

@@ -0,0 +1,39 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package nginx_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-provider-azurerm/internal/acceptance"
+	"github.com/hashicorp/terraform-provider-azurerm/internal/acceptance/check"
+)
+
+type NginxConfigurationDataSource struct{}
+
+func TestAccNginxConfigurationDataSource_basic(t *testing.T) {
+	data := acceptance.BuildTestData(t, "data.azurerm_nginx_configuration", "test")
+	r := NginxConfigurationDataSource{}
+
+	data.DataSourceTest(t, []acceptance.TestStep{
+		{
+			Config: r.basic(data),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).Key("root_file").Exists(),
+				check.That(data.ResourceName).Key("config_file").Exists(),
+			),
+		},
+	})
+}
+
+func (d NginxConfigurationDataSource) basic(data acceptance.TestData) string {
+	return fmt.Sprintf(`
+%s
+
+data "azurerm_nginx_configuration" "test" {
+  nginx_deployment_id = azurerm_nginx_deployment.test.id
+}
+`, ConfigurationResource{}.basic(data))
+}

internal/services/nginx/nginx_configuration_resource.go

@@ -93,15 +93,7 @@ func (c ConfigurationModel) ToSDKModel() nginxconfiguration.NginxConfiguration {
 
 type ConfigurationResource struct{}
 
-// This resource has been deprecated and will be removed in the next major release.
-// Default Nginx Configuration cannot be created anymore for service API breaking change created it automatically
-// nginx configuration block is now embedded into nginx deployment resource
-func (m *ConfigurationResource) DeprecatedInFavourOfResource() string {
-	return "azurerm_nginx_deployment"
-}
-
 var _ sdk.Resource = (*ConfigurationResource)(nil)
-var _ sdk.ResourceWithDeprecationReplacedBy = &ConfigurationResource{}
 
 func (m ConfigurationResource) Arguments() map[string]*pluginsdk.Schema {
 	return map[string]*pluginsdk.Schema{